Phonon anharmonicity and thermal conductivity of two-dimensional van der Waals materials: A review

Two-dimensional (2D) van der Waals (vdW) materials have extraordinary thermal properties due to the effect of quantum confinement, making them promising for thermoelectric energy conversion and thermal management in microelectronic devices. In this review, the mechanism of phonon anharmonicity origi...

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Bibliographic Details
Published in:Science China. Physics, mechanics & astronomy mechanics & astronomy, 2022-11, Vol.65 (11), p.117004, Article 117004
Main Authors: Yan, Xuefei, Wang, Bowen, Hai, Yulong, Kripalani, Devesh R., Ke, Qingqing, Cai, Yongqing
Format: Article
Language:English
Subjects:
Anharmonicity
Astronomy
Classical and Continuum Physics
Electrons
Energy conversion
Energy transfer
Graphene
Gruneisen parameter
Heat conductivity
Heat transfer
Invited Review
Observations and Techniques
Phonons
Physics
Physics and Astronomy
Quantum confinement
Thermal conductivity
Thermal management
Thermal properties
Thermodynamic properties
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Summary:Two-dimensional (2D) van der Waals (vdW) materials have extraordinary thermal properties due to the effect of quantum confinement, making them promising for thermoelectric energy conversion and thermal management in microelectronic devices. In this review, the mechanism of phonon anharmonicity originating from three- and four-phonon interactions is derived. The phonon anharmonicity of 2D vdW materials, involving the Grüneisen parameter, phonon lifetime, and thermal conductivity, is summarized and derived in detail. The size-dependent thermal conductivity of representative 2D vdW materials is discussed experimentally and theoretically. This review will present fundamental and advanced knowledge on how to evaluate the phonon anharmonicity in 2D vdW materials, which will aid the design of new structures and materials for applications related to energy transfer and conversion.
ISSN:1674-7348
1869-1927
DOI:10.1007/s11433-022-1949-9