Nonequilibrium Green’s function method for phonon heat transport in quantum system

Phonon heat transport property in quantum devices is of great interesting since it presents significant quantum behaviors. In the past few decades, great efforts have been devoted to establish the theoretical method for phonon heat transport simulation in nanostructures. However, modeling phonon hea...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2022-03, Vol.34 (22), p.223001
Main Authors: Zeng, Yu-Jia, Ding, Zhong-Ke, Pan, Hui, Feng, Ye-Xin, Chen, Ke-Qiu
Format: Article
Language:English
Subjects:
anharmonic effect
many-body interaction
nonequilibrium Green’s function
phonon transport
quantum system
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Summary:Phonon heat transport property in quantum devices is of great interesting since it presents significant quantum behaviors. In the past few decades, great efforts have been devoted to establish the theoretical method for phonon heat transport simulation in nanostructures. However, modeling phonon heat transport from wavelike coherent regime to particlelike incoherent regime remains a challenging task. The widely adopted theoretical approach, such as molecular dynamics, semiclassical Boltzmann transport equation, captures quantum mechanical effects within different degrees of approximation. Among them, Non-equilibrium Green's function (NEGF) method has attracted wide attention, as its ability to perform full quantum simulation including many-body interactions. In this review, we summarized recent theoretical advances of phonon NEGF method and the applications on the numerical simulation for phonon heat transport in nanostructures. At last, the challenges of numerical simulation are discussed.
ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/ac5c21