Abstract
Silicon thermal conductivities are obtained from the solution of the linearized phonon Boltzmann transport equation without the use of any parameter-fitting. Perturbation theory is used to compute the strength of three-phonon and isotope scattering mechanisms. Matrix elements based on Fermi’s golden rule are computed exactly without assuming either average or mode-dependent Grüeisen parameters, and with no underlying assumptions of crystal isotropy. The environment-dependent interatomic potential is employed to describe the interatomic force constants and the perturbing Hamiltonians. A detailed methodology to accurately find three-phonon processes satisfying energy- and momentum-conservation rules is also described. Bulk silicon thermal conductivity values are computed across a range of temperatures and shown to match experimental data very well. It is found that about two-thirds of the heat transport in bulk silicon may be attributed to transverse acoustic modes. Effective relaxation times and mean free paths are computed in order to provide a more complete picture of the detailed transport mechanisms and for use with carrier transport models based on the Boltzmann transport equation.
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Dates
Type | When |
---|---|
Created | 15 years, 11 months ago (Sept. 28, 2009, 3:43 p.m.) |
Deposited | 2 years, 2 months ago (June 25, 2023, 2:59 p.m.) |
Indexed | 1 month, 1 week ago (July 30, 2025, 6:53 a.m.) |
Issued | 15 years, 11 months ago (Sept. 15, 2009) |
Published | 15 years, 11 months ago (Sept. 15, 2009) |
Published Online | 15 years, 11 months ago (Sept. 28, 2009) |
Published Print | 15 years, 11 months ago (Sept. 15, 2009) |
@article{Pascual_Guti_rrez_2009, title={Thermal conductivity and phonon transport properties of silicon using perturbation theory and the environment-dependent interatomic potential}, volume={106}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.3195080}, DOI={10.1063/1.3195080}, number={6}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Pascual-Gutiérrez, José A. and Murthy, Jayathi Y. and Viskanta, Raymond}, year={2009}, month=sep }