---
OA_place: publisher
OA_type: hybrid
PlanS_conform: '1'
_id: '20492'
abstract:
- lang: eng
  text: The glassy thermal conductivities observed in crystalline inorganic perovskites
    such as Cs3Bi2I6Cl3 are perplexing and lacking theoretical explanations. Here,
    we ﬁrst experimentally measure its thermal transport behavior from 20 to 300 K,
    after synthesizing Cs3Bi2I6Cl3 single crystals. Using path-integral molecular
    dynamics simulations driven by machine learning potentials, we reveal that Cs3Bi2I6Cl3
    has large lattice distortions at low temperatures, which may be related to the
    large atomic size mismatch. Employing the Wigner formulation of thermal transport,
    we reproduce theexperimental thermal conductivities based on lattice-distorted
    structures. This studythus provides a framework for predicting and understanding
    glassy thermal transportin materials with strong lattice disorder.
acknowledged_ssus:
- _id: ScienComp
acknowledgement: Z.Z. acknowledges the European Union’s Horizon2020 research and innovation
  programme under the Marie Skłodowska-Curie Grant Agreement No. 101034413. We acknowledge
  the high-performance computing facilities offered by Institute of Science and Technology
  Austria and The University of Hong Kong.
article_processing_charge: No
article_type: original
author:
- first_name: Zezhu
  full_name: Zeng, Zezhu
  id: 54a2c730-803f-11ed-ab7e-95b29d2680e7
  last_name: Zeng
  orcid: 0000-0001-5126-4928
- first_name: Zheyong
  full_name: Fan, Zheyong
  last_name: Fan
- first_name: Michele
  full_name: Simoncelli, Michele
  last_name: Simoncelli
- first_name: Chen
  full_name: Chen, Chen
  last_name: Chen
- first_name: Ting
  full_name: Liang, Ting
  last_name: Liang
- first_name: Yue
  full_name: Chen, Yue
  last_name: Chen
- first_name: Geoff
  full_name: Thornton, Geoff
  last_name: Thornton
- first_name: Bingqing
  full_name: Cheng, Bingqing
  id: cbe3cda4-d82c-11eb-8dc7-8ff94289fcc9
  last_name: Cheng
  orcid: 0000-0002-3584-9632
citation:
  ama: Zeng Z, Fan Z, Simoncelli M, et al. Lattice distortion leads to glassy thermal
    transport in crystalline Cs3Bi2I6Cl3. <i>Proceedings of the National Academy of
    Sciences</i>. 2025;122(41):e2415664122. doi:<a href="https://doi.org/10.1073/pnas.2415664122">10.1073/pnas.2415664122</a>
  apa: Zeng, Z., Fan, Z., Simoncelli, M., Chen, C., Liang, T., Chen, Y., … Cheng,
    B. (2025). Lattice distortion leads to glassy thermal transport in crystalline
    Cs3Bi2I6Cl3. <i>Proceedings of the National Academy of Sciences</i>. National
    Academy of Sciences. <a href="https://doi.org/10.1073/pnas.2415664122">https://doi.org/10.1073/pnas.2415664122</a>
  chicago: Zeng, Zezhu, Zheyong Fan, Michele Simoncelli, Chen Chen, Ting Liang, Yue
    Chen, Geoff Thornton, and Bingqing Cheng. “Lattice Distortion Leads to Glassy
    Thermal Transport in Crystalline Cs3Bi2I6Cl3.” <i>Proceedings of the National
    Academy of Sciences</i>. National Academy of Sciences, 2025. <a href="https://doi.org/10.1073/pnas.2415664122">https://doi.org/10.1073/pnas.2415664122</a>.
  ieee: Z. Zeng <i>et al.</i>, “Lattice distortion leads to glassy thermal transport
    in crystalline Cs3Bi2I6Cl3,” <i>Proceedings of the National Academy of Sciences</i>,
    vol. 122, no. 41. National Academy of Sciences, p. e2415664122, 2025.
  ista: Zeng Z, Fan Z, Simoncelli M, Chen C, Liang T, Chen Y, Thornton G, Cheng B.
    2025. Lattice distortion leads to glassy thermal transport in crystalline Cs3Bi2I6Cl3.
    Proceedings of the National Academy of Sciences. 122(41), e2415664122.
  mla: Zeng, Zezhu, et al. “Lattice Distortion Leads to Glassy Thermal Transport in
    Crystalline Cs3Bi2I6Cl3.” <i>Proceedings of the National Academy of Sciences</i>,
    vol. 122, no. 41, National Academy of Sciences, 2025, p. e2415664122, doi:<a href="https://doi.org/10.1073/pnas.2415664122">10.1073/pnas.2415664122</a>.
  short: Z. Zeng, Z. Fan, M. Simoncelli, C. Chen, T. Liang, Y. Chen, G. Thornton,
    B. Cheng, Proceedings of the National Academy of Sciences 122 (2025) e2415664122.
corr_author: '1'
das_tickbox: '1'
dataavailabilitystatement: Primitive Data Types have been deposited in GitHub (Cs3Bi2I6Cl3_heat_conductivity)
  (https://github.com/ZengZezhu/Cs3Bi2I6Cl3_heat_conductivity) (74).
date_created: 2025-10-19T22:01:31Z
date_published: 2025-10-14T00:00:00Z
date_updated: 2026-08-07T10:11:03Z
day: '14'
ddc:
- '540'
department:
- _id: BiCh
doi: 10.1073/pnas.2415664122
ec_funded: 1
external_id:
  isi:
  - '001600415200001'
  pmid:
  - '41052324'
file:
- access_level: open_access
  checksum: 3f9cd0d67ffe9110fb238407671584b7
  content_type: application/pdf
  creator: dernst
  date_created: 2025-10-21T10:02:15Z
  date_updated: 2025-10-21T10:02:15Z
  file_id: '20513'
  file_name: 2025_PNAS_Zeng.pdf
  file_size: 12244843
  relation: main_file
  success: 1
file_date_updated: 2025-10-21T10:02:15Z
fulldoi: https://doi.org/10.1073/pnas.2415664122
has_accepted_license: '1'
intvolume: '       122'
isi: 1
issue: '41'
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
page: e2415664122
pmid: 1
project:
- _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c
  call_identifier: H2020
  grant_number: '101034413'
  name: 'IST-BRIDGE: International postdoctoral program'
publication: Proceedings of the National Academy of Sciences
publication_identifier:
  eissn:
  - 1091-6490
publication_status: published
publisher: National Academy of Sciences
quality_controlled: '1'
related_material:
  link:
  - relation: software
    url: https://github.com/ZengZezhu/Cs3Bi2I6Cl3_heat_conductivity
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: Lattice distortion leads to glassy thermal transport in crystalline Cs3Bi2I6Cl3
tmp:
  image: /images/cc_by_nc_nd.png
  legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
  name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
    (CC BY-NC-ND 4.0)
  short: CC BY-NC-ND (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 122
year: '2025'
...
---
OA_place: publisher
OA_type: hybrid
_id: '20011'
abstract:
- lang: eng
  text: Heat transport in glasses over a wide temperature range is critical for applications
    in gate dielectrics and thermal insulators but remains poorly understood due to
    the challenges in modeling vibrational anharmonicity and configurational dynamics
    across the glass transition. Recent predictions show an unusual decrease in thermal
    conductivity (κ) with temperature in amorphous hafnia (a-HfO2), contrasting with
    the typical trend in glasses. Using molecular dynamics with a machine-learning-based
    neuroevolution potential, we compute κ of a-HfO2 from 50 K to 2000 K. At low temperatures,
    the Wigner transport equation captures both anharmonicity and quantum statistics.
    Above 1200 K, atomic diffusion invalidates the quasiparticle picture, and we resort
    to the Green–Kubo method to capture convective transport. We further extend the
    Wigner transport equation to supercooled a-HfO2, revealing the crucial role of
    low-frequency modes in facilitating heat transport. The computed κ, based on both
    Green–Kubo and Wigner transport theories, increases continuously with temperature
    up to 2000 K.
acknowledged_ssus:
- _id: ScienComp
acknowledgement: We thank Ludovic Berthier for fruitful discussions and Ting Liang
  for providing the initial structures of a-SiO2. Z.Z. acknowledges funding from the
  European Union’s Horizon 2020 Research and Innovation Programme, under Marie Skłodowska-Curie
  grant agreement No. 101034413. The authors also acknowledge the research computing
  facilities provided by HPC ISTA and ITS HKU.
article_processing_charge: Yes (in subscription journal)
article_type: original
author:
- first_name: Zezhu
  full_name: Zeng, Zezhu
  id: 54a2c730-803f-11ed-ab7e-95b29d2680e7
  last_name: Zeng
  orcid: 0000-0001-5126-4928
- first_name: Xia
  full_name: Liang, Xia
  last_name: Liang
- first_name: Zheyong
  full_name: Fan, Zheyong
  last_name: Fan
- first_name: Yue
  full_name: Chen, Yue
  last_name: Chen
- first_name: Michele
  full_name: Simoncelli, Michele
  last_name: Simoncelli
- first_name: Bingqing
  full_name: Cheng, Bingqing
  id: cbe3cda4-d82c-11eb-8dc7-8ff94289fcc9
  last_name: Cheng
  orcid: 0000-0002-3584-9632
citation:
  ama: Zeng Z, Liang X, Fan Z, Chen Y, Simoncelli M, Cheng B. Thermal transport of
    amorphous hafnia across the glass transition. <i>ACS Materials Letters</i>. 2025:2695-2701.
    doi:<a href="https://doi.org/10.1021/acsmaterialslett.5c00263">10.1021/acsmaterialslett.5c00263</a>
  apa: Zeng, Z., Liang, X., Fan, Z., Chen, Y., Simoncelli, M., &#38; Cheng, B. (2025).
    Thermal transport of amorphous hafnia across the glass transition. <i>ACS Materials
    Letters</i>. American Chemical Society. <a href="https://doi.org/10.1021/acsmaterialslett.5c00263">https://doi.org/10.1021/acsmaterialslett.5c00263</a>
  chicago: Zeng, Zezhu, Xia Liang, Zheyong Fan, Yue Chen, Michele Simoncelli, and
    Bingqing Cheng. “Thermal Transport of Amorphous Hafnia across the Glass Transition.”
    <i>ACS Materials Letters</i>. American Chemical Society, 2025. <a href="https://doi.org/10.1021/acsmaterialslett.5c00263">https://doi.org/10.1021/acsmaterialslett.5c00263</a>.
  ieee: Z. Zeng, X. Liang, Z. Fan, Y. Chen, M. Simoncelli, and B. Cheng, “Thermal
    transport of amorphous hafnia across the glass transition,” <i>ACS Materials Letters</i>.
    American Chemical Society, pp. 2695–2701, 2025.
  ista: Zeng Z, Liang X, Fan Z, Chen Y, Simoncelli M, Cheng B. 2025. Thermal transport
    of amorphous hafnia across the glass transition. ACS Materials Letters., 2695–2701.
  mla: Zeng, Zezhu, et al. “Thermal Transport of Amorphous Hafnia across the Glass
    Transition.” <i>ACS Materials Letters</i>, American Chemical Society, 2025, pp.
    2695–701, doi:<a href="https://doi.org/10.1021/acsmaterialslett.5c00263">10.1021/acsmaterialslett.5c00263</a>.
  short: Z. Zeng, X. Liang, Z. Fan, Y. Chen, M. Simoncelli, B. Cheng, ACS Materials
    Letters (2025) 2695–2701.
corr_author: '1'
das_tickbox: '1'
dataavailabilitystatement: All necessary source data files generated for this study
  are available in the GitHub repository https://github.com/ZengZezhu/heat-conductivity-a-HfO2.
date_created: 2025-07-13T22:01:24Z
date_published: 2025-06-30T00:00:00Z
date_updated: 2026-08-07T10:06:48Z
day: '30'
ddc:
- '530'
department:
- _id: BiCh
doi: 10.1021/acsmaterialslett.5c00263
ec_funded: 1
external_id:
  isi:
  - '001520226300001'
file:
- access_level: open_access
  checksum: d61e63439ddeaef29e9a2ee0f65c4ec1
  content_type: application/pdf
  creator: dernst
  date_created: 2025-12-30T09:13:06Z
  date_updated: 2025-12-30T09:13:06Z
  file_id: '20903'
  file_name: 2025_ACSMaterialsLetters_Zeng.pdf
  file_size: 2402059
  relation: main_file
  success: 1
file_date_updated: 2025-12-30T09:13:06Z
fulldoi: https://doi.org/10.1021/acsmaterialslett.5c00263
has_accepted_license: '1'
isi: 1
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
page: 2695-2701
project:
- _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c
  call_identifier: H2020
  grant_number: '101034413'
  name: 'IST-BRIDGE: International postdoctoral program'
publication: ACS Materials Letters
publication_identifier:
  eissn:
  - 2639-4979
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
related_material:
  link:
  - relation: software
    url: https://github.com/ZengZezhu/heat-conductivity-a-HfO2
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: Thermal transport of amorphous hafnia across the glass transition
tmp:
  image: /images/cc_by_nc_nd.png
  legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
  name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
    (CC BY-NC-ND 4.0)
  short: CC BY-NC-ND (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2025'
...
---
OA_type: closed access
_id: '20704'
abstract:
- lang: eng
  text: Generative models have advanced significantly in sampling material systems
    with continuous variables, such as atomistic structures. However, their application
    to discrete variables, like atom types or spin states, remains underexplored.
    In this work, we introduce a discrete flow matching model, tailored for systems
    with discrete phase-space coordinates (e.g., the Ising model or a multicomponent
    system on a lattice). This approach enables a single model to sample free energy
    surfaces over a wide temperature range with minimal training overhead, and the
    model generation is scalable to larger lattice sizes than those in the training
    set. We demonstrate our approach on the 2D Ising model, showing efficient and
    reliable free energy sampling. These results highlight the potential of flow matching
    for low-cost, scalable free energy sampling in discrete systems and suggest promising
    extensions to alchemical degrees of freedom in crystalline materials. The codebase
    developed for this work is openly available at https://github.com/tuoping/alchemicalFES.
acknowledged_ssus:
- _id: ScienComp
acknowledgement: P.T. acknowledges funding from FFG MAGNIFICO and the BIDMaP Postdoctoral
  Fellowship. Z.Z. acknowledges funding from the European Union’s Horizon 2020 research
  and innovation program under the Marie Skłodowska-Curie grant agreement No. 101034413.
  The authors acknowledge the research computing facilities provided by the Institute
  of Science and Technology Austria (ISTA), and resources of the National Energy Research
  Scientific Computing Center (NERSC), a Department of Energy Office of Science User
  Facility using NERSC award DOEERCAP0031751 ’GenAI@NERSC’. P.T. acknowledges valued
  discussions with Dr. Daniel King, Dr. Lei Wang, and Dr. Fuzhi Dai.
article_processing_charge: No
article_type: original
author:
- first_name: Ping
  full_name: Tuo, Ping
  id: 6e5644c0-c180-11ed-a2da-facc4c9f4f09
  last_name: Tuo
- first_name: Zezhu
  full_name: Zeng, Zezhu
  id: 54a2c730-803f-11ed-ab7e-95b29d2680e7
  last_name: Zeng
  orcid: 0000-0001-5126-4928
- first_name: Jiale
  full_name: Chen, Jiale
  id: 4d0a9064-1ff6-11ee-9fa6-ec046c604785
  last_name: Chen
  orcid: 0000-0001-5337-5875
- first_name: Bingqing
  full_name: Cheng, Bingqing
  id: cbe3cda4-d82c-11eb-8dc7-8ff94289fcc9
  last_name: Cheng
  orcid: 0000-0002-3584-9632
citation:
  ama: Tuo P, Zeng Z, Chen J, Cheng B. Scalable multitemperature free energy sampling
    of classical Ising spin states. <i>Journal of Chemical Theory and Computation</i>.
    2025;21(22):11427-11435. doi:<a href="https://doi.org/10.1021/acs.jctc.5c01248">10.1021/acs.jctc.5c01248</a>
  apa: Tuo, P., Zeng, Z., Chen, J., &#38; Cheng, B. (2025). Scalable multitemperature
    free energy sampling of classical Ising spin states. <i>Journal of Chemical Theory
    and Computation</i>. American Chemical Society. <a href="https://doi.org/10.1021/acs.jctc.5c01248">https://doi.org/10.1021/acs.jctc.5c01248</a>
  chicago: Tuo, Ping, Zezhu Zeng, Jiale Chen, and Bingqing Cheng. “Scalable Multitemperature
    Free Energy Sampling of Classical Ising Spin States.” <i>Journal of Chemical Theory
    and Computation</i>. American Chemical Society, 2025. <a href="https://doi.org/10.1021/acs.jctc.5c01248">https://doi.org/10.1021/acs.jctc.5c01248</a>.
  ieee: P. Tuo, Z. Zeng, J. Chen, and B. Cheng, “Scalable multitemperature free energy
    sampling of classical Ising spin states,” <i>Journal of Chemical Theory and Computation</i>,
    vol. 21, no. 22. American Chemical Society, pp. 11427–11435, 2025.
  ista: Tuo P, Zeng Z, Chen J, Cheng B. 2025. Scalable multitemperature free energy
    sampling of classical Ising spin states. Journal of Chemical Theory and Computation.
    21(22), 11427–11435.
  mla: Tuo, Ping, et al. “Scalable Multitemperature Free Energy Sampling of Classical
    Ising Spin States.” <i>Journal of Chemical Theory and Computation</i>, vol. 21,
    no. 22, American Chemical Society, 2025, pp. 11427–35, doi:<a href="https://doi.org/10.1021/acs.jctc.5c01248">10.1021/acs.jctc.5c01248</a>.
  short: P. Tuo, Z. Zeng, J. Chen, B. Cheng, Journal of Chemical Theory and Computation
    21 (2025) 11427–11435.
corr_author: '1'
das_tickbox: '0'
date_created: 2025-11-30T23:02:06Z
date_published: 2025-10-31T00:00:00Z
date_updated: 2026-08-07T10:29:06Z
day: '31'
department:
- _id: BiCh
- _id: DaAl
doi: 10.1021/acs.jctc.5c01248
ec_funded: 1
external_id:
  isi:
  - '001605927900001'
  pmid:
  - '41172130'
fulldoi: https://doi.org/10.1021/acs.jctc.5c01248
intvolume: '        21'
isi: 1
issue: '22'
language:
- iso: eng
month: '10'
oa_version: None
page: 11427-11435
pmid: 1
project:
- _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c
  call_identifier: H2020
  grant_number: '101034413'
  name: 'IST-BRIDGE: International postdoctoral program'
publication: Journal of Chemical Theory and Computation
publication_identifier:
  eissn:
  - 1549-9626
  issn:
  - 1549-9618
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
related_material:
  link:
  - relation: software
    url: https://github.com/tuoping/alchemicalFES
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: Scalable multitemperature free energy sampling of classical Ising spin states
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 21
year: '2025'
...
---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '15311'
abstract:
- lang: eng
  text: Materials with low thermal conductivity usually have complex crystal structures.
    Herein we experimentally find that a simple crystal structure material AgTlI2
    (I4/mcm) owns an extremely low thermal conductivity of 0.25 W/mK at room temperature.
    To understand this anomaly, we perform in-depth theoretical studies based on ab
    initio molecular dynamics simulations and anharmonic lattice dynamics. We find
    that the unique atomic arrangement and weak chemical bonding provide a permissive
    environment for strong oscillations of Ag atoms, leading to a considerable rattling
    behaviour and giant lattice anharmonicity. This feature is also verified by the
    experimental probability density function refinement of single-crystal diffraction.
    The particularly strong anharmonicity breaks down the conventional phonon gas
    model, giving rise to non-negligible wavelike phonon behaviours in AgTlI2 at 300
    K. Intriguingly, unlike many strongly anharmonic materials where a small propagative
    thermal conductivity is often accompanied by a large diffusive thermal conductivity,
    we find an unusual coexistence of ultralow propagative and diffusive thermal conductivities
    in AgTlI2 based on the thermal transport unified theory. This study underscores
    the potential of simple crystal structures in achieving low thermal conductivity
    and encourages further experimental research to enrich the family of materials
    with ultralow thermal conductivity.
acknowledgement: "We thank Bingqing Cheng (IST Austria) and Terumasa Tadano (NIMS\r\nJapan)
  for reading the manuscript and providing insightful comments.\r\nThis work is supported
  by the Research Grants Council of Hong Kong\r\n(C7002-22Y and 17318122). ZZ acknowledges
  the European Union’s\r\nHorizon 2020 research and innovation programme under the
  Marie\r\nSkłodowska-Curie grant agreement No. 101034413. XS acknowledges\r\nfunding
  from the European Union’s Horizon 2020 research and innovation programme under the
  Marie Sklodowska-Curie grant agreement\r\nNo. 101034329, and the WINNING Normandy
  Programme supported by\r\nthe Normandy Region. The computations were performed using\r\nresearch
  computing facilities offered by Information Technology Services, at the University
  of Hong Kong."
article_number: '3007'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Zezhu
  full_name: Zeng, Zezhu
  id: 54a2c730-803f-11ed-ab7e-95b29d2680e7
  last_name: Zeng
  orcid: 0000-0001-5126-4928
- first_name: Xingchen
  full_name: Shen, Xingchen
  last_name: Shen
- first_name: Ruihuan
  full_name: Cheng, Ruihuan
  last_name: Cheng
- first_name: Olivier
  full_name: Perez, Olivier
  last_name: Perez
- first_name: Niuchang
  full_name: Ouyang, Niuchang
  last_name: Ouyang
- first_name: Zheyong
  full_name: Fan, Zheyong
  last_name: Fan
- first_name: Pierric
  full_name: Lemoine, Pierric
  last_name: Lemoine
- first_name: Bernard
  full_name: Raveau, Bernard
  last_name: Raveau
- first_name: Emmanuel
  full_name: Guilmeau, Emmanuel
  last_name: Guilmeau
- first_name: Yue
  full_name: Chen, Yue
  last_name: Chen
citation:
  ama: Zeng Z, Shen X, Cheng R, et al. Pushing thermal conductivity to its lower limit
    in crystals with simple structures. <i>Nature Communications</i>. 2024;15. doi:<a
    href="https://doi.org/10.1038/s41467-024-46799-3">10.1038/s41467-024-46799-3</a>
  apa: Zeng, Z., Shen, X., Cheng, R., Perez, O., Ouyang, N., Fan, Z., … Chen, Y. (2024).
    Pushing thermal conductivity to its lower limit in crystals with simple structures.
    <i>Nature Communications</i>. Springer Nature. <a href="https://doi.org/10.1038/s41467-024-46799-3">https://doi.org/10.1038/s41467-024-46799-3</a>
  chicago: Zeng, Zezhu, Xingchen Shen, Ruihuan Cheng, Olivier Perez, Niuchang Ouyang,
    Zheyong Fan, Pierric Lemoine, Bernard Raveau, Emmanuel Guilmeau, and Yue Chen.
    “Pushing Thermal Conductivity to Its Lower Limit in Crystals with Simple Structures.”
    <i>Nature Communications</i>. Springer Nature, 2024. <a href="https://doi.org/10.1038/s41467-024-46799-3">https://doi.org/10.1038/s41467-024-46799-3</a>.
  ieee: Z. Zeng <i>et al.</i>, “Pushing thermal conductivity to its lower limit in
    crystals with simple structures,” <i>Nature Communications</i>, vol. 15. Springer
    Nature, 2024.
  ista: Zeng Z, Shen X, Cheng R, Perez O, Ouyang N, Fan Z, Lemoine P, Raveau B, Guilmeau
    E, Chen Y. 2024. Pushing thermal conductivity to its lower limit in crystals with
    simple structures. Nature Communications. 15, 3007.
  mla: Zeng, Zezhu, et al. “Pushing Thermal Conductivity to Its Lower Limit in Crystals
    with Simple Structures.” <i>Nature Communications</i>, vol. 15, 3007, Springer
    Nature, 2024, doi:<a href="https://doi.org/10.1038/s41467-024-46799-3">10.1038/s41467-024-46799-3</a>.
  short: Z. Zeng, X. Shen, R. Cheng, O. Perez, N. Ouyang, Z. Fan, P. Lemoine, B. Raveau,
    E. Guilmeau, Y. Chen, Nature Communications 15 (2024).
corr_author: '1'
das_tickbox: '1'
dataavailabilitystatement: "All necessary source data files generated for this study
  are available in the SI repository https://github.com/ZengZezhu/Thermal-conductivity-AgTlI2
  see ref 72.\r\n72. Zeng, Z. et al. Source data for pushing thermal conductivity
  to its lower limit in crystals with simple structures. Zenodo (2024)."
date_created: 2024-04-14T22:01:00Z
date_published: 2024-04-08T00:00:00Z
date_updated: 2026-08-07T10:33:08Z
day: '08'
ddc:
- '530'
department:
- _id: BiCh
doi: 10.1038/s41467-024-46799-3
ec_funded: 1
external_id:
  arxiv:
  - '2310.01838'
  isi:
  - '001198902100029'
  pmid:
  - '38589376'
file:
- access_level: open_access
  checksum: f81bd6ba42f740d060fb446eeebc1035
  content_type: application/pdf
  creator: cchlebak
  date_created: 2024-04-26T10:34:07Z
  date_updated: 2024-04-26T10:34:07Z
  file_id: '15346'
  file_name: 2024_NatComm_Zeng.pdf
  file_size: 3049375
  relation: main_file
  success: 1
file_date_updated: 2024-04-26T10:34:07Z
fulldoi: https://doi.org/10.1038/s41467-024-46799-3
has_accepted_license: '1'
intvolume: '        15'
isi: 1
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c
  call_identifier: H2020
  grant_number: '101034413'
  name: 'IST-BRIDGE: International postdoctoral program'
publication: Nature Communications
publication_identifier:
  eissn:
  - 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: Pushing thermal conductivity to its lower limit in crystals with simple structures
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 15
year: '2024'
...
---
_id: '15052'
abstract:
- lang: eng
  text: "Substrate induces mechanical strain on perovskite devices, which can result
    in alterations to its lattice dynamics and thermal transport. Herein, we have
    performed a theoretical investigation on the anharmonic lattice dynamics and thermal
    property of perovskite Rb2SnBr6 and Cs2SnBr6 under strains using perturbation
    theory up to the fourth-order terms and the unified thermal transport theory.
    We demonstrate a pronounced hardening of low-frequency optical phonons as temperature
    increases, indicating strong lattice anharmonicity and the necessity of adopting
    temperature-dependent interatomic force constants in the lattice thermal conductivity
    (\r\nκL) calculations. It is found that the low-lying optical phonon modes of
    Rb2SnBr6 are extremely soft and their phonon energies are almost strain independent,
    which ultimately lead to a lower \r\nκL and a weaker strain dependence than Cs2SnBr6.
    We further reveal that the strain dependence of these phonon modes in the A2XB6-type
    perovskites weakens as their ibrational frequency decreases. This study deepens
    the understanding of lattice thermal transport in perovskites A2XB6 and provides
    a perspective on the selection of materials that meet the expected thermal behaviors
    in practical applications."
acknowledgement: "This work is supported by the Research Grants Council of Hong Kong
  (C7002-22Y and 17318122). The authors are grateful for the research computing facilities
  offered by\r\nITS, HKU. Z.Z. acknowledges the European Union’s Horizon 2020 research
  and innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 101034413."
article_number: '054305'
article_processing_charge: No
article_type: original
author:
- first_name: Ruihuan
  full_name: Cheng, Ruihuan
  last_name: Cheng
- first_name: Zezhu
  full_name: Zeng, Zezhu
  id: 54a2c730-803f-11ed-ab7e-95b29d2680e7
  last_name: Zeng
  orcid: 0000-0001-5126-4928
- first_name: Chen
  full_name: Wang, Chen
  last_name: Wang
- first_name: Niuchang
  full_name: Ouyang, Niuchang
  last_name: Ouyang
- first_name: Yue
  full_name: Chen, Yue
  last_name: Chen
citation:
  ama: Cheng R, Zeng Z, Wang C, Ouyang N, Chen Y. Impact of strain-insensitive low-frequency
    phonon modes on lattice thermal transport in AxXB6-type perovskites. <i>Physical
    Review B</i>. 2024;109(5). doi:<a href="https://doi.org/10.1103/physrevb.109.054305">10.1103/physrevb.109.054305</a>
  apa: Cheng, R., Zeng, Z., Wang, C., Ouyang, N., &#38; Chen, Y. (2024). Impact of
    strain-insensitive low-frequency phonon modes on lattice thermal transport in
    AxXB6-type perovskites. <i>Physical Review B</i>. American Physical Society. <a
    href="https://doi.org/10.1103/physrevb.109.054305">https://doi.org/10.1103/physrevb.109.054305</a>
  chicago: Cheng, Ruihuan, Zezhu Zeng, Chen Wang, Niuchang Ouyang, and Yue Chen. “Impact
    of Strain-Insensitive Low-Frequency Phonon Modes on Lattice Thermal Transport
    in AxXB6-Type Perovskites.” <i>Physical Review B</i>. American Physical Society,
    2024. <a href="https://doi.org/10.1103/physrevb.109.054305">https://doi.org/10.1103/physrevb.109.054305</a>.
  ieee: R. Cheng, Z. Zeng, C. Wang, N. Ouyang, and Y. Chen, “Impact of strain-insensitive
    low-frequency phonon modes on lattice thermal transport in AxXB6-type perovskites,”
    <i>Physical Review B</i>, vol. 109, no. 5. American Physical Society, 2024.
  ista: Cheng R, Zeng Z, Wang C, Ouyang N, Chen Y. 2024. Impact of strain-insensitive
    low-frequency phonon modes on lattice thermal transport in AxXB6-type perovskites.
    Physical Review B. 109(5), 054305.
  mla: Cheng, Ruihuan, et al. “Impact of Strain-Insensitive Low-Frequency Phonon Modes
    on Lattice Thermal Transport in AxXB6-Type Perovskites.” <i>Physical Review B</i>,
    vol. 109, no. 5, 054305, American Physical Society, 2024, doi:<a href="https://doi.org/10.1103/physrevb.109.054305">10.1103/physrevb.109.054305</a>.
  short: R. Cheng, Z. Zeng, C. Wang, N. Ouyang, Y. Chen, Physical Review B 109 (2024).
das_tickbox: '0'
date_created: 2024-03-04T07:41:23Z
date_published: 2024-02-14T00:00:00Z
date_updated: 2026-08-07T10:30:33Z
day: '14'
department:
- _id: BiCh
doi: 10.1103/physrevb.109.054305
ec_funded: 1
external_id:
  isi:
  - '001198615900003'
fulldoi: https://doi.org/10.1103/physrevb.109.054305
intvolume: '       109'
isi: 1
issue: '5'
language:
- iso: eng
month: '02'
oa_version: None
project:
- _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c
  call_identifier: H2020
  grant_number: '101034413'
  name: 'IST-BRIDGE: International postdoctoral program'
publication: Physical Review B
publication_identifier:
  eissn:
  - 2469-9969
  issn:
  - 2469-9950
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Impact of strain-insensitive low-frequency phonon modes on lattice thermal
  transport in AxXB6-type perovskites
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 109
year: '2024'
...
---
_id: '15359'
abstract:
- lang: eng
  text: Molecular dynamics (MD) simulations play an important role in understanding
    and engineering heat transport properties of complex materials. An essential requirement
    for reliably predicting heat transport properties is the use of accurate and efficient
    interatomic potentials. Recently, machine-learned potentials (MLPs) have shown
    great promise in providing the required accuracy for a broad range of materials.
    In this mini-review and tutorial, we delve into the fundamentals of heat transport,
    explore pertinent MD simulation methods, and survey the applications of MLPs in
    MD simulations of heat transport. Furthermore, we provide a step-by-step tutorial
    on developing MLPs for highly efficient and predictive heat transport simulations,
    utilizing the neuroevolution potentials as implemented in the GPUMD package. Our
    aim with this mini-review and tutorial is to empower researchers with valuable
    insights into cutting-edge methodologies that can significantly enhance the accuracy
    and efficiency of MD simulations for heat transport studies.
acknowledgement: H.D. is supported by the Science Foundation from the Education Department
  of Liaoning Province (No. JYTMS20231613) and the Doctoral start-up Fund of Bohai
  University (No. 0523bs008). P.Y. is supported by the Israel Academy of Sciences
  and Humanities & Council for Higher Education Excellence Fellowship Program for
  International Postdoctoral Researchers. K.X. and T.L. acknowledge support from the
  National Key R&D Project from Ministry of Science and Technology of China (No. 2022YFA1203100),
  the Research Grants Council of Hong Kong (No. AoE/P-701/20), and RGC GRF (No. 14220022).
  Z.Z. acknowledges the European Union’s Horizon 2020 research and innovation programme
  under the Marie Skłodowska-Curie Grant Agreement No. 101034413. S.X. acknowledges
  financial support from the National Natural Science Foundation of China (NNSFC)
  (Grant No. 12174276).
article_number: '161101'
article_processing_charge: Yes (in subscription journal)
article_type: review
arxiv: 1
author:
- first_name: Haikuan
  full_name: Dong, Haikuan
  last_name: Dong
- first_name: Yongbo
  full_name: Shi, Yongbo
  last_name: Shi
- first_name: Penghua
  full_name: Ying, Penghua
  last_name: Ying
- first_name: Ke
  full_name: Xu, Ke
  last_name: Xu
- first_name: Ting
  full_name: Liang, Ting
  last_name: Liang
- first_name: Yanzhou
  full_name: Wang, Yanzhou
  last_name: Wang
- first_name: Zezhu
  full_name: Zeng, Zezhu
  id: 54a2c730-803f-11ed-ab7e-95b29d2680e7
  last_name: Zeng
  orcid: 0000-0001-5126-4928
- first_name: Xin
  full_name: Wu, Xin
  last_name: Wu
- first_name: Wenjiang
  full_name: Zhou, Wenjiang
  last_name: Zhou
- first_name: Shiyun
  full_name: Xiong, Shiyun
  last_name: Xiong
- first_name: Shunda
  full_name: Chen, Shunda
  last_name: Chen
- first_name: Zheyong
  full_name: Fan, Zheyong
  last_name: Fan
citation:
  ama: 'Dong H, Shi Y, Ying P, et al. Molecular dynamics simulations of heat transport
    using machine-learned potentials: A mini-review and tutorial on GPUMD with neuroevolution
    potentials. <i>Journal of Applied Physics</i>. 2024;135(16). doi:<a href="https://doi.org/10.1063/5.0200833">10.1063/5.0200833</a>'
  apa: 'Dong, H., Shi, Y., Ying, P., Xu, K., Liang, T., Wang, Y., … Fan, Z. (2024).
    Molecular dynamics simulations of heat transport using machine-learned potentials:
    A mini-review and tutorial on GPUMD with neuroevolution potentials. <i>Journal
    of Applied Physics</i>. AIP Publishing. <a href="https://doi.org/10.1063/5.0200833">https://doi.org/10.1063/5.0200833</a>'
  chicago: 'Dong, Haikuan, Yongbo Shi, Penghua Ying, Ke Xu, Ting Liang, Yanzhou Wang,
    Zezhu Zeng, et al. “Molecular Dynamics Simulations of Heat Transport Using Machine-Learned
    Potentials: A Mini-Review and Tutorial on GPUMD with Neuroevolution Potentials.”
    <i>Journal of Applied Physics</i>. AIP Publishing, 2024. <a href="https://doi.org/10.1063/5.0200833">https://doi.org/10.1063/5.0200833</a>.'
  ieee: 'H. Dong <i>et al.</i>, “Molecular dynamics simulations of heat transport
    using machine-learned potentials: A mini-review and tutorial on GPUMD with neuroevolution
    potentials,” <i>Journal of Applied Physics</i>, vol. 135, no. 16. AIP Publishing,
    2024.'
  ista: 'Dong H, Shi Y, Ying P, Xu K, Liang T, Wang Y, Zeng Z, Wu X, Zhou W, Xiong
    S, Chen S, Fan Z. 2024. Molecular dynamics simulations of heat transport using
    machine-learned potentials: A mini-review and tutorial on GPUMD with neuroevolution
    potentials. Journal of Applied Physics. 135(16), 161101.'
  mla: 'Dong, Haikuan, et al. “Molecular Dynamics Simulations of Heat Transport Using
    Machine-Learned Potentials: A Mini-Review and Tutorial on GPUMD with Neuroevolution
    Potentials.” <i>Journal of Applied Physics</i>, vol. 135, no. 16, 161101, AIP
    Publishing, 2024, doi:<a href="https://doi.org/10.1063/5.0200833">10.1063/5.0200833</a>.'
  short: H. Dong, Y. Shi, P. Ying, K. Xu, T. Liang, Y. Wang, Z. Zeng, X. Wu, W. Zhou,
    S. Xiong, S. Chen, Z. Fan, Journal of Applied Physics 135 (2024).
das_tickbox: '1'
dataavailabilitystatement: All the training and test datasets and the trained NEP
  models for crystalline silicon are freely available at https://gitlab.com/brucefan1983/nep-data.
  The training datasets, trained NEP, DP, and MTP models for graphene and MD input
  files for reproducing Fig. 3 are freely available at https://github.com/hityingph/supporting-info/tree/main/Dong_GPUMD_Tutorial_2024.
date_created: 2024-05-05T22:01:03Z
date_published: 2024-04-28T00:00:00Z
date_updated: 2026-08-07T10:35:13Z
day: '28'
ddc:
- '530'
department:
- _id: BiCh
doi: 10.1063/5.0200833
ec_funded: 1
external_id:
  arxiv:
  - '2401.16249'
  isi:
  - '001215967400009'
file:
- access_level: open_access
  checksum: 4d6abb3ebe058ce8eebf4fc7e9cdda0d
  content_type: application/pdf
  creator: dernst
  date_created: 2024-05-13T08:07:44Z
  date_updated: 2024-05-13T08:07:44Z
  file_id: '15382'
  file_name: 2024_JourApplPhysics_Dong.pdf
  file_size: 3240613
  relation: main_file
  success: 1
file_date_updated: 2024-05-13T08:07:44Z
fulldoi: https://doi.org/10.1063/5.0200833
has_accepted_license: '1'
intvolume: '       135'
isi: 1
issue: '16'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Preprint
project:
- _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c
  call_identifier: H2020
  grant_number: '101034413'
  name: 'IST-BRIDGE: International postdoctoral program'
publication: Journal of Applied Physics
publication_identifier:
  eissn:
  - 1089-7550
  issn:
  - 0021-8979
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
related_material:
  link:
  - relation: software
    url: https://gitlab.com/brucefan1983/nep-data
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: 'Molecular dynamics simulations of heat transport using machine-learned potentials:
  A mini-review and tutorial on GPUMD with neuroevolution potentials'
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 135
year: '2024'
...
---
_id: '14425'
abstract:
- lang: eng
  text: 'Water adsorption and dissociation processes on pristine low-index TiO2 interfaces
    are important but poorly understood outside the well-studied anatase (101) and
    rutile (110). To understand these, we construct three sets of machine learning
    potentials that are simultaneously applicable to various TiO2 surfaces, based
    on three density-functional-theory approximations. Here we show the water dissociation
    free energies on seven pristine TiO2 surfaces, and predict that anatase (100),
    anatase (110), rutile (001), and rutile (011) favor water dissociation, anatase
    (101) and rutile (100) have mostly molecular adsorption, while the simulations
    of rutile (110) sensitively depend on the slab thickness and molecular adsorption
    is preferred with thick slabs. Moreover, using an automated algorithm, we reveal
    that these surfaces follow different types of atomistic mechanisms for proton
    transfer and water dissociation: one-step, two-step, or both. These mechanisms
    can be rationalized based on the arrangements of water molecules on the different
    surfaces. Our finding thus demonstrates that the different pristine TiO2 surfaces
    react with water in distinct ways, and cannot be represented using just the low-energy
    anatase (101) and rutile (110) surfaces.'
acknowledgement: F.S., J.H., and B.C. thank the Swiss National Supercomputing Centre
  (CSCS) for the generous allocation of CPU hours via production project s1108 at
  the Piz Daint supercomputer. B.C. acknowledges resources provided by the Cambridge
  Tier-2 system operated by the University of Cambridge Research Computing Service
  funded by EPSRC Tier-2 capital grant EP/P020259/1. J.C. acknowledges the Beijing
  Natural Science Foundation for support under grant No. JQ22001. F.S., and J.H. thank
  the Swiss Platform for Advanced Scientific Computing (PASC) via the 2021-2024 “Ab
  Initio Molecular Dynamics at the Exa-Scale” project. This project has received funding
  from the European Union’s Horizon 2020 research and innovation programme under the
  Marie Skłodowska-Curie grant agreement No 101034413.
article_number: '6131'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Zezhu
  full_name: Zeng, Zezhu
  id: 54a2c730-803f-11ed-ab7e-95b29d2680e7
  last_name: Zeng
  orcid: 0000-0001-5126-4928
- first_name: Felix
  full_name: Wodaczek, Felix
  id: 8b4b6a9f-32b0-11ee-9fa8-bbe85e26258e
  last_name: Wodaczek
  orcid: 0009-0000-1457-795X
- first_name: Keyang
  full_name: Liu, Keyang
  last_name: Liu
- first_name: Frederick
  full_name: Stein, Frederick
  last_name: Stein
- first_name: Jürg
  full_name: Hutter, Jürg
  last_name: Hutter
- first_name: Ji
  full_name: Chen, Ji
  last_name: Chen
- first_name: Bingqing
  full_name: Cheng, Bingqing
  id: cbe3cda4-d82c-11eb-8dc7-8ff94289fcc9
  last_name: Cheng
  orcid: 0000-0002-3584-9632
citation:
  ama: Zeng Z, Wodaczek F, Liu K, et al. Mechanistic insight on water dissociation
    on pristine low-index TiO2 surfaces from machine learning molecular dynamics simulations.
    <i>Nature Communications</i>. 2023;14. doi:<a href="https://doi.org/10.1038/s41467-023-41865-8">10.1038/s41467-023-41865-8</a>
  apa: Zeng, Z., Wodaczek, F., Liu, K., Stein, F., Hutter, J., Chen, J., &#38; Cheng,
    B. (2023). Mechanistic insight on water dissociation on pristine low-index TiO2
    surfaces from machine learning molecular dynamics simulations. <i>Nature Communications</i>.
    Springer Nature. <a href="https://doi.org/10.1038/s41467-023-41865-8">https://doi.org/10.1038/s41467-023-41865-8</a>
  chicago: Zeng, Zezhu, Felix Wodaczek, Keyang Liu, Frederick Stein, Jürg Hutter,
    Ji Chen, and Bingqing Cheng. “Mechanistic Insight on Water Dissociation on Pristine
    Low-Index TiO2 Surfaces from Machine Learning Molecular Dynamics Simulations.”
    <i>Nature Communications</i>. Springer Nature, 2023. <a href="https://doi.org/10.1038/s41467-023-41865-8">https://doi.org/10.1038/s41467-023-41865-8</a>.
  ieee: Z. Zeng <i>et al.</i>, “Mechanistic insight on water dissociation on pristine
    low-index TiO2 surfaces from machine learning molecular dynamics simulations,”
    <i>Nature Communications</i>, vol. 14. Springer Nature, 2023.
  ista: Zeng Z, Wodaczek F, Liu K, Stein F, Hutter J, Chen J, Cheng B. 2023. Mechanistic
    insight on water dissociation on pristine low-index TiO2 surfaces from machine
    learning molecular dynamics simulations. Nature Communications. 14, 6131.
  mla: Zeng, Zezhu, et al. “Mechanistic Insight on Water Dissociation on Pristine
    Low-Index TiO2 Surfaces from Machine Learning Molecular Dynamics Simulations.”
    <i>Nature Communications</i>, vol. 14, 6131, Springer Nature, 2023, doi:<a href="https://doi.org/10.1038/s41467-023-41865-8">10.1038/s41467-023-41865-8</a>.
  short: Z. Zeng, F. Wodaczek, K. Liu, F. Stein, J. Hutter, J. Chen, B. Cheng, Nature
    Communications 14 (2023).
corr_author: '1'
das_tickbox: '1'
dataavailabilitystatement: "The machine learning potentials, training sets, sample
  DFT and metadynamics input files, PYTHON data analysis scripts and other necessary
  source data files generated for this study are available in the SI repository (https://github.com/BingqingCheng/TiO2-water)
  see ref 58.\r\n58. Zeng, Z. et al. Source data for Mechanistic insight on water
  dissociation on pristine low-index TiO2 surfaces from machine learning molecular
  dynamics simulations, Zenodo, https://zenodo.org/record/8301965 (2023)."
date_created: 2023-10-15T22:01:10Z
date_published: 2023-10-02T00:00:00Z
date_updated: 2026-08-07T11:00:29Z
day: '02'
ddc:
- '540'
- '000'
department:
- _id: BiCh
- _id: GradSch
doi: 10.1038/s41467-023-41865-8
ec_funded: 1
external_id:
  arxiv:
  - '2303.07433'
  isi:
  - '001084354900008'
  pmid:
  - '37783698'
file:
- access_level: open_access
  checksum: 7d1dffd36b672ec679f08f70ce79da87
  content_type: application/pdf
  creator: dernst
  date_created: 2023-10-16T07:34:49Z
  date_updated: 2023-10-16T07:34:49Z
  file_id: '14432'
  file_name: 2023_NatureComm_Zeng.pdf
  file_size: 3194116
  relation: main_file
  success: 1
file_date_updated: 2023-10-16T07:34:49Z
fulldoi: https://doi.org/10.1038/s41467-023-41865-8
has_accepted_license: '1'
intvolume: '        14'
isi: 1
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c
  call_identifier: H2020
  grant_number: '101034413'
  name: 'IST-BRIDGE: International postdoctoral program'
publication: Nature Communications
publication_identifier:
  eissn:
  - 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
  link:
  - relation: software
    url: https://github.com/BingqingCheng/TiO2-water
researchdata_availability: yes
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Mechanistic insight on water dissociation on pristine low-index TiO2 surfaces
  from machine learning molecular dynamics simulations
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 14
year: '2023'
...
---
_id: '14605'
abstract:
- lang: eng
  text: The phonon transport mechanisms and ultralow lattice thermal conductivities
    (κL) in silver halide AgX (X=Cl,Br,I) compounds are not yet well understood. Herein,
    we study the lattice dynamics and thermal property of AgX under the framework
    of perturbation theory and the two-channel Wigner thermal transport model based
    on accurate machine learning potentials. We find that an accurate extraction of
    the third-order atomic force constants from largely displaced configurations is
    significant for the calculation of the κL of AgX, and the coherence thermal transport
    is also non-negligible. In AgI, however, the calculated κL still considerably
    overestimates the experimental values even including four-phonon scatterings.
    Molecular dynamics (MD) simulations using machine learning potential suggest an
    important role of the higher-than-fourth-order lattice anharmonicity in the low-frequency
    phonon linewidths of AgI at room temperature, which can be related to the simultaneous
    restrictions of the three- and four-phonon phase spaces. The κL of AgI calculated
    using MD phonon lifetimes including full-order lattice anharmonicity shows a better
    agreement with experiments.
acknowledgement: This work is supported by the Research Grants Council of Hong Kong
  (Grants No. 17318122 and No. 17306721). The authors are grateful for the research
  computing facilities offered by ITS, HKU. Z.Z. acknowledges the European Union’s
  Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant
  Agreement No. 101034413.
article_number: '174302'
article_processing_charge: No
article_type: original
author:
- first_name: Niuchang
  full_name: Ouyang, Niuchang
  last_name: Ouyang
- first_name: Zezhu
  full_name: Zeng, Zezhu
  id: 54a2c730-803f-11ed-ab7e-95b29d2680e7
  last_name: Zeng
  orcid: 0000-0001-5126-4928
- first_name: Chen
  full_name: Wang, Chen
  last_name: Wang
- first_name: Qi
  full_name: Wang, Qi
  last_name: Wang
- first_name: Yue
  full_name: Chen, Yue
  last_name: Chen
citation:
  ama: Ouyang N, Zeng Z, Wang C, Wang Q, Chen Y. Role of high-order lattice anharmonicity
    in the phonon thermal transport of silver halide AgX (X=Cl,Br, I). <i>Physical
    Review B</i>. 2023;108(17). doi:<a href="https://doi.org/10.1103/PhysRevB.108.174302">10.1103/PhysRevB.108.174302</a>
  apa: Ouyang, N., Zeng, Z., Wang, C., Wang, Q., &#38; Chen, Y. (2023). Role of high-order
    lattice anharmonicity in the phonon thermal transport of silver halide AgX (X=Cl,Br,
    I). <i>Physical Review B</i>. American Physical Society. <a href="https://doi.org/10.1103/PhysRevB.108.174302">https://doi.org/10.1103/PhysRevB.108.174302</a>
  chicago: Ouyang, Niuchang, Zezhu Zeng, Chen Wang, Qi Wang, and Yue Chen. “Role of
    High-Order Lattice Anharmonicity in the Phonon Thermal Transport of Silver Halide
    AgX (X=Cl,Br, I).” <i>Physical Review B</i>. American Physical Society, 2023.
    <a href="https://doi.org/10.1103/PhysRevB.108.174302">https://doi.org/10.1103/PhysRevB.108.174302</a>.
  ieee: N. Ouyang, Z. Zeng, C. Wang, Q. Wang, and Y. Chen, “Role of high-order lattice
    anharmonicity in the phonon thermal transport of silver halide AgX (X=Cl,Br, I),”
    <i>Physical Review B</i>, vol. 108, no. 17. American Physical Society, 2023.
  ista: Ouyang N, Zeng Z, Wang C, Wang Q, Chen Y. 2023. Role of high-order lattice
    anharmonicity in the phonon thermal transport of silver halide AgX (X=Cl,Br, I).
    Physical Review B. 108(17), 174302.
  mla: Ouyang, Niuchang, et al. “Role of High-Order Lattice Anharmonicity in the Phonon
    Thermal Transport of Silver Halide AgX (X=Cl,Br, I).” <i>Physical Review B</i>,
    vol. 108, no. 17, 174302, American Physical Society, 2023, doi:<a href="https://doi.org/10.1103/PhysRevB.108.174302">10.1103/PhysRevB.108.174302</a>.
  short: N. Ouyang, Z. Zeng, C. Wang, Q. Wang, Y. Chen, Physical Review B 108 (2023).
corr_author: '1'
das_tickbox: '0'
date_created: 2023-11-26T23:00:54Z
date_published: 2023-11-01T00:00:00Z
date_updated: 2026-08-07T11:09:12Z
day: '01'
department:
- _id: BiCh
doi: 10.1103/PhysRevB.108.174302
ec_funded: 1
external_id:
  isi:
  - '001101152500001'
fulldoi: https://doi.org/10.1103/PhysRevB.108.174302
intvolume: '       108'
isi: 1
issue: '17'
language:
- iso: eng
month: '11'
oa_version: None
project:
- _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c
  call_identifier: H2020
  grant_number: '101034413'
  name: 'IST-BRIDGE: International postdoctoral program'
publication: Physical Review B
publication_identifier:
  eissn:
  - 2469-9969
  issn:
  - 2469-9950
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Role of high-order lattice anharmonicity in the phonon thermal transport of
  silver halide AgX (X=Cl,Br, I)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 108
year: '2023'
...
