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arXiv · 1608.06917

Ab initio Green-Kubo Approach for the Thermal Conductivity of Solids

Christian Carbogno·Rampi Ramprasad·Matthias Scheffler
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Abstract

We herein present a first-principles formulation of the Green-Kubo method that allows the accurate assessment of the non-radiative thermal conductivity of solid semiconductors and insulators in equilibrium ab initio molecular dynamics calculations. Using the virial for the nuclei, we propose a unique ab initio definition of the heat flux. Accurate size- and time convergence are achieved within moderate computational effort by a robust, asymptotically exact extrapolation scheme. We demonstrate the capabilities of the technique by investigating the thermal conductivity of extreme high and low heat conducting materials, namely diamond Si and tetragonal ZrO$_2$.

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Christian Carbogno, Rampi Ramprasad, Matthias Scheffler. 2017-02-06. Ab initio Green-Kubo Approach for the Thermal Conductivity of Solids. https://doi.org/10.1103/physrevlett.118.175901

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