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Elastic strain engineering of lattice thermal conductivity of silicon: an ab-initio study

delete2026-03-05
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PRE
AI
W
Wencong Shi
Z
Zhe Shi
L
Lilia M. Woods
J
Ju Li *
M
Ming Dao *
DOI:10.1016/j.eml.2026.102469delete
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Abstract

Abstract

En 中文
• The thermal conductivity response of silicon is dependent on the strain state, with hydrostatic, biaxial, and uniaxial loading each producing a unique behavior • Uniaxial and biaxial strains can induce highly anisotropic thermal conductivity in silicon, with relative variations up to 13.4% and 58.5%, respectively • Close agreement between ab initio calculations and experimental data confirms that compressive elastic strain systematically reduces silicon's thermal conductivity • Through elastic strain engineering, silicon’ thermal conductivity can be tuned from −90% to +2% relative to its zero‑strain value, by modulating phonon anharmonicity
Keywords:
elastic strain engineering
lattice thermal conductivity
silicon
phonon anharmonicity
ab initio calculations

Journal

Extreme Mechanics Letters cover
Extreme Mechanics Letters
IF:
4.5
Papers:
1.5K
Citations:
6.7K

Organization

U
university of south florida
Scholars:
1.5W
Papers: 1.2W
Citations: 9
M
massachusetts institute of technology
Scholars:
3.3K
Papers: 1.2K
Citations: 0
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