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Revisiting lattice thermal transport in PbTe: The crucial role of quartic anharmonicity

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.5040887· OSTI ID:1472120
 [1]
  1. Univ. of California, Los Angeles, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Here, we perform a first-principles study of lattice thermal transport in PbTe by explicitly considering anharmonicity up to 4th order. To determine the temperature-dependent lattice constant of PbTe beyond quasiharmonic approximation, we introduce a simple yet effective scheme to account for anharmonic phonon renormalization at finite temperature. Moreover, we explicitly compute mode-resolved phonon lifetimes by including both three- and four-phonon scatterings. We find that (1) anharmonic phonon renormalization leads to strong vibrational frequency shifts which improve the agreement between simulated and experimental lattice constants; (2) these frequency shifts lead to a significant increase in lattice thermal conductivity (κl) because of reduced phonon scattering phase space; and (3) four-phonon scatterings are responsible for severe reduction in κl on top of three-phonon scatterings, making κl consistent with experiments. Our results suggest that the predicted κl and its temperature dependence without considering thermal expansion, anharmonic phonon renormalization and four-phonon scatterings could accidentally agree with experiments due to error cancellation. Our study not only deepens the understanding of lattice thermal transport in PbTe but also exemplifies a widely applicable approach to investigate lattice dynamics and thermal transport properties from first-principles calculations including high-order anharmonicity.
Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
Midwest Integrated Center for Computational Materials (MICCoM); USDOE; USDOE Office of Science; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1472120
Alternate ID(s):
OSTI ID: 1464318
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 7 Vol. 113; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Phonon anharmonic frequency shift induced by four-phonon scattering calculated from first principles journal October 2018
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Perspective on ab initio phonon thermal transport journal August 2019
Compressive sensing lattice dynamics. I. General formalism journal November 2019
Stronger role of four-phonon scattering than three-phonon scattering in thermal conductivity of III-V semiconductors at room temperature journal December 2019
Particlelike Phonon Propagation Dominates Ultralow Lattice Thermal Conductivity in Crystalline Tl 3 VSe 4 journal February 2020
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Compressive sensing lattice dynamics. I. General formalism text January 2018

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