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Combining linear-scaling quantum transport and machine-learning molecular dynamics to study thermal and electronic transports in complex materials

23 Oct 2023arXiv:2310.15314links table onlyarchive 2025-07-28

Zheyong Fan, Yang Xiao, Yanzhou Wang, Penghua Ying, Shunda Chen, Haikuan Dong

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We propose an efficient approach for simultaneous prediction of thermal and electronic transport properties in complex materials. Firstly, a highly efficient machine-learned neuroevolution potential is trained using reference data from quantum-mechanical density-functional theory calculations. This trained potential is then applied in large-scale molecular dynamics simulations, enabling the generation of realistic structures and accurate characterization of thermal transport properties. In addition, molecular dynamics simulations of atoms and linear-scaling quantum transport calculations of electrons are coupled to account for the electron-phonon scattering and other disorders that affect the charge carriers governing the electronic transport properties. We demonstrate the usefulness of this unified approach by studying thermoelectric transport properties of a graphene antidot lattice.

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