Thermal diffusivity above the Mott-Ioffe-Regel limit
Abstract
We present high-resolution thermal diffusivity measurements on several near optimally doped electron- and hole-doped cuprate systems in a temperature range that passes through the Mott-Ioffe-Regel limit, above which the quasiparticle picture fails. Our primary observations are that the inverse thermal diffusivity is linear in temperature and can be fitted to $$D^{-1}_Q = aT + b$$. The slope a is interpreted through the Planckian relaxation time $$τ ≈ ℏ/k_BT$$ and a thermal diffusion velocity v B, which is close, but larger than the sound velocity. The intercept b represents a crossover diffusion constant that separates coherent from incoherent quasiparticles. These observations suggest that both phonons and electrons participate in the thermal transport, while reaching the Planckian limit for relaxation time.
- Authors:
-
[1];
- Stanford Univ., CA (United States). Dept. of Physics; Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials
- Univ. of Southern California, Los Angeles, CA (United States)
- Inst. for Basic Science (IBS), Seoul (Korea). Center for Correlated Electron Systems
- Univ. of Maryland, College Park, MD (United States). Dept. of Physics and Center for Nanophysics & Advanced Materials
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1605024
- Grant/Contract Number:
- AC02-76SF00515; DMR-1708334
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B
- Additional Journal Information:
- Journal Volume: 100; Journal Issue: 24; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Zhang, Jiecheng, Kountz, Erik D., Levenson-Falk, Eli M., Song, Dongjoon, Greene, Richard L., and Kapitulnik, Aharon. Thermal diffusivity above the Mott-Ioffe-Regel limit. United States: N. p., 2019.
Web. doi:10.1103/physrevb.100.241114.
Zhang, Jiecheng, Kountz, Erik D., Levenson-Falk, Eli M., Song, Dongjoon, Greene, Richard L., & Kapitulnik, Aharon. Thermal diffusivity above the Mott-Ioffe-Regel limit. United States. https://doi.org/10.1103/physrevb.100.241114
Zhang, Jiecheng, Kountz, Erik D., Levenson-Falk, Eli M., Song, Dongjoon, Greene, Richard L., and Kapitulnik, Aharon. Tue .
"Thermal diffusivity above the Mott-Ioffe-Regel limit". United States. https://doi.org/10.1103/physrevb.100.241114. https://www.osti.gov/servlets/purl/1605024.
@article{osti_1605024,
title = {Thermal diffusivity above the Mott-Ioffe-Regel limit},
author = {Zhang, Jiecheng and Kountz, Erik D. and Levenson-Falk, Eli M. and Song, Dongjoon and Greene, Richard L. and Kapitulnik, Aharon},
abstractNote = {We present high-resolution thermal diffusivity measurements on several near optimally doped electron- and hole-doped cuprate systems in a temperature range that passes through the Mott-Ioffe-Regel limit, above which the quasiparticle picture fails. Our primary observations are that the inverse thermal diffusivity is linear in temperature and can be fitted to $D^{-1}_Q = aT + b$. The slope a is interpreted through the Planckian relaxation time $τ ≈ ℏ/k_BT$ and a thermal diffusion velocity v B, which is close, but larger than the sound velocity. The intercept b represents a crossover diffusion constant that separates coherent from incoherent quasiparticles. These observations suggest that both phonons and electrons participate in the thermal transport, while reaching the Planckian limit for relaxation time.},
doi = {10.1103/physrevb.100.241114},
journal = {Physical Review. B},
number = 24,
volume = 100,
place = {United States},
year = {Tue Dec 24 00:00:00 EST 2019},
month = {Tue Dec 24 00:00:00 EST 2019}
}
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Works referencing / citing this record:
Thermalization and Possible Signatures of Quantum Chaos in Complex Crystalline Materials
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