Assessing the Validity of Quantum Corrections to Molecular Dynamics Simulations of Bulk Silicon

Abstract:

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Thermal conductivities of bulk silicon are calculated by equilibrium molecular dynamics (MD) simulations. Applying common used quantum corrections to the MD results, does not bring them into better agreement with the theoretical predictions or experimental data, while the uncorrected values are closer to the theoretical predictions and experiments below 400K. By assessing the validity of quantum corrections according to theoretical calculations and MD simulations, we demonstrate that the hypothesis of equating the heat fluxes is not reliable. In addition, we explore that the rations of thermal conductivities of MD simulations and quantum calculations are approximate to 1. Then a modified quantum correction for mapping MD simulations to quantum systems is proposed.

Info:

Periodical:

Edited by:

Xiaohao Wang

Pages:

653-657

DOI:

10.4028/www.scientific.net/KEM.483.653

Citation:

Q. M. Zhou et al., "Assessing the Validity of Quantum Corrections to Molecular Dynamics Simulations of Bulk Silicon", Key Engineering Materials, Vol. 483, pp. 653-657, 2011

Online since:

June 2011

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Price:

$35.00

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