---
_id: '13197'
abstract:
- lang: eng
text: "Nominally identical materials exchange net electric charge during contact
through a mechanism that is still debated. ‘Mosaic models’, in which surfaces
are presumed to consist of a random patchwork of microscopic donor/acceptor sites,
offer an appealing explanation for this phenomenon. However, recent experiments
have shown that global differences persist even between same-material samples,
which the standard mosaic framework does not account for. Here, we expand the
mosaic framework by incorporating global differences in the densities of donor/acceptor
sites. We develop\r\nan analytical model, backed by numerical simulations, that
smoothly connects the global and deterministic charge transfer of different materials
to the local and stochastic mosaic picture normally associated with identical
materials. Going further, we extend our model to explain the effect of contact
asymmetries during sliding, providing a plausible explanation for reversal of
charging sign that has been observed experimentally."
acknowledgement: "This project has received funding from the European Research Council
Grant Agreement No. 949120 and from\r\nthe European Union’s Horizon 2020 research
and innovation program under the Marie Sklodowska-Curie Grant\r\nAgreement No. 754411. "
article_number: '065601'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Galien M
full_name: Grosjean, Galien M
id: 0C5FDA4A-9CF6-11E9-8939-FF05E6697425
last_name: Grosjean
orcid: 0000-0001-5154-417X
- first_name: Scott R
full_name: Waitukaitis, Scott R
id: 3A1FFC16-F248-11E8-B48F-1D18A9856A87
last_name: Waitukaitis
orcid: 0000-0002-2299-3176
citation:
ama: 'Grosjean GM, Waitukaitis SR. Asymmetries in triboelectric charging: Generalizing
mosaic models to different-material samples and sliding contacts. Physical
Review Materials. 2023;7(6). doi:10.1103/physrevmaterials.7.065601'
apa: 'Grosjean, G. M., & Waitukaitis, S. R. (2023). Asymmetries in triboelectric
charging: Generalizing mosaic models to different-material samples and sliding
contacts. Physical Review Materials. American Physical Society. https://doi.org/10.1103/physrevmaterials.7.065601'
chicago: 'Grosjean, Galien M, and Scott R Waitukaitis. “Asymmetries in Triboelectric
Charging: Generalizing Mosaic Models to Different-Material Samples and Sliding
Contacts.” Physical Review Materials. American Physical Society, 2023.
https://doi.org/10.1103/physrevmaterials.7.065601.'
ieee: 'G. M. Grosjean and S. R. Waitukaitis, “Asymmetries in triboelectric charging:
Generalizing mosaic models to different-material samples and sliding contacts,”
Physical Review Materials, vol. 7, no. 6. American Physical Society, 2023.'
ista: 'Grosjean GM, Waitukaitis SR. 2023. Asymmetries in triboelectric charging:
Generalizing mosaic models to different-material samples and sliding contacts.
Physical Review Materials. 7(6), 065601.'
mla: 'Grosjean, Galien M., and Scott R. Waitukaitis. “Asymmetries in Triboelectric
Charging: Generalizing Mosaic Models to Different-Material Samples and Sliding
Contacts.” Physical Review Materials, vol. 7, no. 6, 065601, American Physical
Society, 2023, doi:10.1103/physrevmaterials.7.065601.'
short: G.M. Grosjean, S.R. Waitukaitis, Physical Review Materials 7 (2023).
corr_author: '1'
date_created: 2023-07-07T12:48:01Z
date_published: 2023-06-13T00:00:00Z
date_updated: 2025-04-14T07:43:55Z
day: '13'
ddc:
- '537'
department:
- _id: ScWa
doi: 10.1103/physrevmaterials.7.065601
ec_funded: 1
external_id:
arxiv:
- '2304.12861'
isi:
- '001019565900002'
file:
- access_level: open_access
checksum: 75584730d9cdd50eeccb4c52c509776d
content_type: application/pdf
creator: ggrosjea
date_created: 2023-07-07T12:49:51Z
date_updated: 2023-07-07T12:49:51Z
file_id: '13198'
file_name: Mosaic_asymmetries.pdf
file_size: 1127040
relation: main_file
success: 1
file_date_updated: 2023-07-07T12:49:51Z
has_accepted_license: '1'
intvolume: ' 7'
isi: 1
issue: '6'
keyword:
- Physics and Astronomy (miscellaneous)
- General Materials Science
language:
- iso: eng
month: '06'
oa: 1
oa_version: Submitted Version
project:
- _id: 0aa60e99-070f-11eb-9043-a6de6bdc3afa
call_identifier: H2020
grant_number: '949120'
name: 'Tribocharge: a multi-scale approach to an enduring problem in physics'
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
publication: Physical Review Materials
publication_identifier:
issn:
- 2475-9953
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Asymmetries in triboelectric charging: Generalizing mosaic models to different-material
samples and sliding contacts'
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 7
year: '2023'
...
---
_id: '8101'
abstract:
- lang: eng
text: By rigorously accounting for mesoscale spatial correlations in donor/acceptor
surface properties, we develop a scale-spanning model for same-material tribocharging.
We find that mesoscale correlations affect not only the magnitude of charge transfer
but also the fluctuations—suppressing otherwise overwhelming charge-transfer variability
that is not observed experimentally. We furthermore propose a generic theoretical
mechanism by which the mesoscale features might emerge, which is qualitatively
consistent with other proposals in the literature.
acknowledgement: "We would like to thank Philip Born, Bartosz Grzybowski, Tarik Baytekin,
and Bilge Baytekin for helpful discussions.\r\nThis project has received funding
from the European Unions Horizon 2020 research and innovation programme under the
Marie Skłodowska-Curie Grant Agreement No. 754411."
article_number: '082602'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Galien M
full_name: Grosjean, Galien M
id: 0C5FDA4A-9CF6-11E9-8939-FF05E6697425
last_name: Grosjean
orcid: 0000-0001-5154-417X
- first_name: Sebastian
full_name: Wald, Sebastian
id: 133F200A-B015-11E9-AD41-0EDAE5697425
last_name: Wald
orcid: 0000-0002-5869-1604
- first_name: Juan Carlos A
full_name: Sobarzo Ponce, Juan Carlos A
id: 4B807D68-AE37-11E9-AC72-31CAE5697425
last_name: Sobarzo Ponce
- first_name: Scott R
full_name: Waitukaitis, Scott R
id: 3A1FFC16-F248-11E8-B48F-1D18A9856A87
last_name: Waitukaitis
orcid: 0000-0002-2299-3176
citation:
ama: Grosjean GM, Wald S, Sobarzo Ponce JCA, Waitukaitis SR. Quantitatively consistent
scale-spanning model for same-material tribocharging. Physical Review Materials.
2020;4(8). doi:10.1103/PhysRevMaterials.4.082602
apa: Grosjean, G. M., Wald, S., Sobarzo Ponce, J. C. A., & Waitukaitis, S. R.
(2020). Quantitatively consistent scale-spanning model for same-material tribocharging.
Physical Review Materials. American Physical Society. https://doi.org/10.1103/PhysRevMaterials.4.082602
chicago: Grosjean, Galien M, Sebastian Wald, Juan Carlos A Sobarzo Ponce, and Scott
R Waitukaitis. “Quantitatively Consistent Scale-Spanning Model for Same-Material
Tribocharging.” Physical Review Materials. American Physical Society, 2020.
https://doi.org/10.1103/PhysRevMaterials.4.082602.
ieee: G. M. Grosjean, S. Wald, J. C. A. Sobarzo Ponce, and S. R. Waitukaitis, “Quantitatively
consistent scale-spanning model for same-material tribocharging,” Physical
Review Materials, vol. 4, no. 8. American Physical Society, 2020.
ista: Grosjean GM, Wald S, Sobarzo Ponce JCA, Waitukaitis SR. 2020. Quantitatively
consistent scale-spanning model for same-material tribocharging. Physical Review
Materials. 4(8), 082602.
mla: Grosjean, Galien M., et al. “Quantitatively Consistent Scale-Spanning Model
for Same-Material Tribocharging.” Physical Review Materials, vol. 4, no.
8, 082602, American Physical Society, 2020, doi:10.1103/PhysRevMaterials.4.082602.
short: G.M. Grosjean, S. Wald, J.C.A. Sobarzo Ponce, S.R. Waitukaitis, Physical
Review Materials 4 (2020).
corr_author: '1'
date_created: 2020-07-07T11:33:54Z
date_published: 2020-08-17T00:00:00Z
date_updated: 2025-04-23T08:51:12Z
day: '17'
ddc:
- '530'
department:
- _id: ScWa
doi: 10.1103/PhysRevMaterials.4.082602
ec_funded: 1
external_id:
arxiv:
- '2006.07120'
isi:
- '000561897000001'
file:
- access_level: open_access
checksum: 288fef1eeb6540c6344bb8f7c8159dc9
content_type: application/pdf
creator: ggrosjea
date_created: 2020-08-17T15:54:20Z
date_updated: 2020-08-17T15:54:20Z
file_id: '8277'
file_name: Grosjean2020.pdf
file_size: 853753
relation: main_file
success: 1
file_date_updated: 2020-08-17T15:54:20Z
has_accepted_license: '1'
intvolume: ' 4'
isi: 1
issue: '8'
keyword:
- electric charge
- tribocharging
- soft matter
- granular materials
- polymers
language:
- iso: eng
month: '08'
oa: 1
oa_version: Published Version
project:
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
publication: Physical Review Materials
publication_identifier:
issn:
- 2475-9953
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
related_material:
record:
- id: '12697'
relation: popular_science
status: public
scopus_import: '1'
status: public
title: Quantitatively consistent scale-spanning model for same-material tribocharging
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: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 4
year: '2020'
...
---
OA_place: repository
OA_type: green
_id: '19825'
abstract:
- lang: eng
text: "We study the electronic structure of delafossite PtCoO2 to elucidate its
extremely small resistivity and high mobility. The band exhibits steep dispersion
near the Fermi level despite the fact that it is formed mainly by Pt \U0001D451
orbitals that are typically localized. We propose a picture based on two hidden
kagome-lattice-like electronic structures: one originating from Pt \U0001D460+\U0001D45D\U0001D465/\U0001D45D\U0001D466
orbitals, and the other from Pt \U0001D4513\U0001D4672−\U0001D45F2+\U0001D451\U0001D465\U0001D466/\U0001D451\U0001D4652−\U0001D4662
orbitals, each placed on the bonds of the triangular lattice. In particular, we
find that the underlying Pt \U0001D460+\U0001D45D\U0001D465/\U0001D45D\U0001D466
bands actually determine the steepness of the original dispersion, so that the
large Fermi velocity can be attributed to the large width of the Pt \U0001D460+\U0001D45D\U0001D465/\U0001D45D\U0001D466
band. In addition, the kagome-like electronic structure gives rise to “orbital-momentum
locking” on the Fermi surface, which reduces the electron scattering by impurities.
We conclude that the combination of the large Fermi velocity and the orbital-momentum
locking is likely to be the origin of the extremely small resistivity in PtCoO2."
article_number: '045002'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Hidetomo
full_name: Usui, Hidetomo
last_name: Usui
- first_name: Masayuki
full_name: Ochi, Masayuki
last_name: Ochi
- first_name: Sota
full_name: Kitamura, Sota
last_name: Kitamura
- first_name: Takashi
full_name: Oka, Takashi
last_name: Oka
- first_name: Daisuke
full_name: Ogura, Daisuke
last_name: Ogura
- first_name: Helge
full_name: Rosner, Helge
last_name: Rosner
- first_name: Maurits W.
full_name: Haverkort, Maurits W.
last_name: Haverkort
- first_name: Veronika
full_name: Sunko, Veronika
id: 23cb1cf6-2c7a-11ef-91a4-f72fc19f20b3
last_name: Sunko
orcid: 0000-0003-2724-3523
- first_name: Philip D. C.
full_name: King, Philip D. C.
last_name: King
- first_name: Andrew P.
full_name: Mackenzie, Andrew P.
last_name: Mackenzie
- first_name: Kazuhiko
full_name: Kuroki, Kazuhiko
last_name: Kuroki
citation:
ama: Usui H, Ochi M, Kitamura S, et al. Hidden kagome-lattice picture and origin
of high conductivity in delafossite PtCoO2. Physical Review Materials.
2019;3(4). doi:10.1103/physrevmaterials.3.045002
apa: Usui, H., Ochi, M., Kitamura, S., Oka, T., Ogura, D., Rosner, H., … Kuroki,
K. (2019). Hidden kagome-lattice picture and origin of high conductivity in delafossite
PtCoO2. Physical Review Materials. American Physical Society. https://doi.org/10.1103/physrevmaterials.3.045002
chicago: Usui, Hidetomo, Masayuki Ochi, Sota Kitamura, Takashi Oka, Daisuke Ogura,
Helge Rosner, Maurits W. Haverkort, et al. “Hidden Kagome-Lattice Picture and
Origin of High Conductivity in Delafossite PtCoO2.” Physical Review Materials.
American Physical Society, 2019. https://doi.org/10.1103/physrevmaterials.3.045002.
ieee: H. Usui et al., “Hidden kagome-lattice picture and origin of high conductivity
in delafossite PtCoO2,” Physical Review Materials, vol. 3, no. 4. American
Physical Society, 2019.
ista: Usui H, Ochi M, Kitamura S, Oka T, Ogura D, Rosner H, Haverkort MW, Sunko
V, King PDC, Mackenzie AP, Kuroki K. 2019. Hidden kagome-lattice picture and origin
of high conductivity in delafossite PtCoO2. Physical Review Materials. 3(4), 045002.
mla: Usui, Hidetomo, et al. “Hidden Kagome-Lattice Picture and Origin of High Conductivity
in Delafossite PtCoO2.” Physical Review Materials, vol. 3, no. 4, 045002,
American Physical Society, 2019, doi:10.1103/physrevmaterials.3.045002.
short: H. Usui, M. Ochi, S. Kitamura, T. Oka, D. Ogura, H. Rosner, M.W. Haverkort,
V. Sunko, P.D.C. King, A.P. Mackenzie, K. Kuroki, Physical Review Materials 3
(2019).
date_created: 2025-06-10T09:22:04Z
date_published: 2019-04-12T00:00:00Z
date_updated: 2025-06-11T06:05:56Z
day: '12'
doi: 10.1103/physrevmaterials.3.045002
extern: '1'
external_id:
arxiv:
- '1812.07213'
intvolume: ' 3'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.1812.07213
month: '04'
oa: 1
oa_version: Preprint
publication: Physical Review Materials
publication_identifier:
issn:
- 2475-9953
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Hidden kagome-lattice picture and origin of high conductivity in delafossite
PtCoO2
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 3
year: '2019'
...