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Title: Accelerated computation of lattice thermal conductivity using neural network interatomic potentials

Abstract

We report with the development of the density functional theory (DFT) and ever-increasing computational capacity, an accurate prediction of lattice thermal conductivity based on the Boltzmann transport theory becomes computationally feasible, contributing to a fundamental understanding of thermal conductivity as well as a choice of the optimal materials for specific applications. However, steep costs in evaluating third-order force constants limit the theoretical investigation to crystals with high symmetry and few atoms in the unit cell. Currently, machine learning potentials are garnering attention as a computationally efficient high-fidelity model of DFT, and several studies have demonstrated that the lattice thermal conductivity could be computed accurately via the machine learning potentials. However, test materials were mostly crystals with high symmetries, and the applicability of machine learning potentials to a wide range of materials has yet to be demonstrated. Furthermore, establishing a standard training set that provides consistent accuracy and computational efficiencies across a wide range of materials would be useful. To address these issues, herein we compute lattice thermal conductivities at 300 K using neural network interatomic potentials. As test materials, we select 25 materials with diverse symmetries and a wide range of lattice thermal conductivities between 10-1 and 103 Wm-1K-1. Amongmore » various choices of training sets, we find that molecular dynamics trajectories at 50–700 K consistently provide results at par with DFT for the test materials. In contrast to pure DFT approaches, the computational cost in the present approach is uniform over the test materials, yielding a speed gain of 2–10 folds. When a smaller reduced training set is used, the relative efficiency increases by up to ~50 folds without sacrificing accuracy significantly. The current work will broaden the application scope of machine learning potentials by establishing a robust framework for accurately computing lattice thermal conductivity with machine learning potentials.« less

Authors:
 [1];  [1];  [1];  [1];  [2];  [1]
  1. Seoul National University (Korea, Republic of)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); Korea Institute of Ceramic Engineering and Technology (KICET); National Research Foundation of Korea (NRF); Ministry of Science and ICT
OSTI Identifier:
1892139
Alternate Identifier(s):
OSTI ID: 1869471
Report Number(s):
LLNL-JRNL-831802
Journal ID: ISSN 0927-0256; 1048754
Grant/Contract Number:  
AC52-07NA27344; N0002599; 2017M3D1A1040689
Resource Type:
Accepted Manuscript
Journal Name:
Computational Materials Science
Additional Journal Information:
Journal Volume: 211; Journal Issue: N/A; Journal ID: ISSN 0927-0256
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; machine learning potential; lattice thermal conductivity; phonon Boltzmann transport equation; accelerated computation

Citation Formats

Choi, Jeong Min, Lee, Kyeongpung, Kim, Sangtae, Moon, Minseok, Jeong, Wonseok, and Han, Seungwu. Accelerated computation of lattice thermal conductivity using neural network interatomic potentials. United States: N. p., 2022. Web. doi:10.1016/j.commatsci.2022.111472.
Choi, Jeong Min, Lee, Kyeongpung, Kim, Sangtae, Moon, Minseok, Jeong, Wonseok, & Han, Seungwu. Accelerated computation of lattice thermal conductivity using neural network interatomic potentials. United States. https://doi.org/10.1016/j.commatsci.2022.111472
Choi, Jeong Min, Lee, Kyeongpung, Kim, Sangtae, Moon, Minseok, Jeong, Wonseok, and Han, Seungwu. Fri . "Accelerated computation of lattice thermal conductivity using neural network interatomic potentials". United States. https://doi.org/10.1016/j.commatsci.2022.111472. https://www.osti.gov/servlets/purl/1892139.
@article{osti_1892139,
title = {Accelerated computation of lattice thermal conductivity using neural network interatomic potentials},
author = {Choi, Jeong Min and Lee, Kyeongpung and Kim, Sangtae and Moon, Minseok and Jeong, Wonseok and Han, Seungwu},
abstractNote = {We report with the development of the density functional theory (DFT) and ever-increasing computational capacity, an accurate prediction of lattice thermal conductivity based on the Boltzmann transport theory becomes computationally feasible, contributing to a fundamental understanding of thermal conductivity as well as a choice of the optimal materials for specific applications. However, steep costs in evaluating third-order force constants limit the theoretical investigation to crystals with high symmetry and few atoms in the unit cell. Currently, machine learning potentials are garnering attention as a computationally efficient high-fidelity model of DFT, and several studies have demonstrated that the lattice thermal conductivity could be computed accurately via the machine learning potentials. However, test materials were mostly crystals with high symmetries, and the applicability of machine learning potentials to a wide range of materials has yet to be demonstrated. Furthermore, establishing a standard training set that provides consistent accuracy and computational efficiencies across a wide range of materials would be useful. To address these issues, herein we compute lattice thermal conductivities at 300 K using neural network interatomic potentials. As test materials, we select 25 materials with diverse symmetries and a wide range of lattice thermal conductivities between 10-1 and 103 Wm-1K-1. Among various choices of training sets, we find that molecular dynamics trajectories at 50–700 K consistently provide results at par with DFT for the test materials. In contrast to pure DFT approaches, the computational cost in the present approach is uniform over the test materials, yielding a speed gain of 2–10 folds. When a smaller reduced training set is used, the relative efficiency increases by up to ~50 folds without sacrificing accuracy significantly. The current work will broaden the application scope of machine learning potentials by establishing a robust framework for accurately computing lattice thermal conductivity with machine learning potentials.},
doi = {10.1016/j.commatsci.2022.111472},
journal = {Computational Materials Science},
number = N/A,
volume = 211,
place = {United States},
year = {Fri May 13 00:00:00 EDT 2022},
month = {Fri May 13 00:00:00 EDT 2022}
}

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