---
OA_place: publisher
OA_type: hybrid
_id: '19809'
abstract:
- lang: eng
  text: In many physical situations in which many-body assemblies exist at temperature
    T, a characteristic quantum-mechanical time scale of approximately h/kbT can be
    identified in both theory and experiment, leading to speculation that it may be
    the shortest meaningful time in such circumstances. This behavior can be investigated
    by probing the scattering rate of electrons in a broad class of materials often
    referred to as “strongly correlated metals”. It is clear that in some cases only
    electron–electron scattering can be its cause, while in others it arises from
    high-temperature scattering of electrons from quantized lattice vibrations, i.e.,
    phonons. In metallic oxides, which are among the most studied materials, analysis
    of electrical transport does not satisfactorily identify the relevant scattering
    mechanism at “high” temperatures near room temperature. We therefore employ a
    contactless optical method to measure thermal diffusivity in two Ru-based layered
    perovskites, Sr3Ru2O7 and Sr2RuO4, and use the measurements to extract the dimensionless
    Lorenz ratio. By comparing our results to the literature data on both conventional
    and unconventional metals, we show how the analysis of high-temperature thermal
    transport can both give important insight into dominant scattering mechanisms
    and be offered as a stringent test of theories attempting to explain anomalous
    scattering.
article_processing_charge: No
article_type: original
author:
- first_name: Fei
  full_name: Sun, Fei
  last_name: Sun
- first_name: Simli
  full_name: Mishra, Simli
  last_name: Mishra
- first_name: Ulrike
  full_name: Stockert, Ulrike
  last_name: Stockert
- first_name: Ramzy
  full_name: Daou, Ramzy
  last_name: Daou
- first_name: Naoki
  full_name: Kikugawa, Naoki
  last_name: Kikugawa
- first_name: Robin S.
  full_name: Perry, Robin S.
  last_name: Perry
- first_name: Elena
  full_name: Hassinger, Elena
  last_name: Hassinger
- first_name: Sean A.
  full_name: Hartnoll, Sean A.
  last_name: Hartnoll
- first_name: Andrew P.
  full_name: Mackenzie, Andrew P.
  last_name: Mackenzie
- first_name: Veronika
  full_name: Sunko, Veronika
  id: 23cb1cf6-2c7a-11ef-91a4-f72fc19f20b3
  last_name: Sunko
  orcid: 0000-0003-2724-3523
citation:
  ama: Sun F, Mishra S, Stockert U, et al. The Lorenz ratio as a guide to scattering
    contributions to transport in strongly correlated metals. <i>Proceedings of the
    National Academy of Sciences</i>. 2024;121(35). doi:<a href="https://doi.org/10.1073/pnas.2318159121">10.1073/pnas.2318159121</a>
  apa: Sun, F., Mishra, S., Stockert, U., Daou, R., Kikugawa, N., Perry, R. S., …
    Sunko, V. (2024). The Lorenz ratio as a guide to scattering contributions to transport
    in strongly correlated metals. <i>Proceedings of the National Academy of Sciences</i>.
    National Academy of Sciences. <a href="https://doi.org/10.1073/pnas.2318159121">https://doi.org/10.1073/pnas.2318159121</a>
  chicago: Sun, Fei, Simli Mishra, Ulrike Stockert, Ramzy Daou, Naoki Kikugawa, Robin
    S. Perry, Elena Hassinger, Sean A. Hartnoll, Andrew P. Mackenzie, and Veronika
    Sunko. “The Lorenz Ratio as a Guide to Scattering Contributions to Transport in
    Strongly Correlated Metals.” <i>Proceedings of the National Academy of Sciences</i>.
    National Academy of Sciences, 2024. <a href="https://doi.org/10.1073/pnas.2318159121">https://doi.org/10.1073/pnas.2318159121</a>.
  ieee: F. Sun <i>et al.</i>, “The Lorenz ratio as a guide to scattering contributions
    to transport in strongly correlated metals,” <i>Proceedings of the National Academy
    of Sciences</i>, vol. 121, no. 35. National Academy of Sciences, 2024.
  ista: Sun F, Mishra S, Stockert U, Daou R, Kikugawa N, Perry RS, Hassinger E, Hartnoll
    SA, Mackenzie AP, Sunko V. 2024. The Lorenz ratio as a guide to scattering contributions
    to transport in strongly correlated metals. Proceedings of the National Academy
    of Sciences. 121(35).
  mla: Sun, Fei, et al. “The Lorenz Ratio as a Guide to Scattering Contributions to
    Transport in Strongly Correlated Metals.” <i>Proceedings of the National Academy
    of Sciences</i>, vol. 121, no. 35, National Academy of Sciences, 2024, doi:<a
    href="https://doi.org/10.1073/pnas.2318159121">10.1073/pnas.2318159121</a>.
  short: F. Sun, S. Mishra, U. Stockert, R. Daou, N. Kikugawa, R.S. Perry, E. Hassinger,
    S.A. Hartnoll, A.P. Mackenzie, V. Sunko, Proceedings of the National Academy of
    Sciences 121 (2024).
date_created: 2025-06-10T09:12:41Z
date_published: 2024-08-27T00:00:00Z
date_updated: 2025-06-10T11:50:48Z
day: '27'
doi: 10.1073/pnas.2318159121
extern: '1'
external_id:
  pmid:
  - '39172781'
fulldoi: https://doi.org/10.1073/pnas.2318159121
has_accepted_license: '1'
intvolume: '       121'
issue: '35'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1073/pnas.2318159121
month: '08'
oa: 1
oa_version: Published Version
pmid: 1
publication: Proceedings of the National Academy of Sciences
publication_identifier:
  eissn:
  - 1091-6490
  issn:
  - 0027-8424
publication_status: published
publisher: National Academy of Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: The Lorenz ratio as a guide to scattering contributions to transport in strongly
  correlated metals
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: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 121
year: '2024'
...