Thermal Transport in Graphene Nanomesh: Unraveling the Role of Brillouin Zone Folding, Phonon Localization and Phonon Confinement

ABSTRACTUnderstanding the role of grain boundaries in controlling heat flow is critical to the success of many envisioned applications of nanocrystalline materials. This study focuses on the effect of grain boundaries on thermal transport behavior in nanocrystalline yttria-stabilized zirconia (YSZ) coatings prepared by metal-organic chemical vapor deposition.

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Subwavelength acoustic topological edge states realized by zone folding and the role of boundaries selection

Journal of Applied Physics ◽

10.1063/1.5051377 ◽

2018 ◽

Vol 124 (17) ◽

pp. 175107 ◽

Cited By ~ 1

Author(s):

Hongqing Dai ◽

Muyan Qian ◽

Junrui Jiao ◽

Baizhan Xia ◽

Dejie Yu

Keyword(s):

Edge States ◽

Zone Folding

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The role of optical phonons in intermediate layer-mediated thermal transport across solid interfaces

Physical Chemistry Chemical Physics ◽

10.1039/c7cp02982a ◽

2017 ◽

Vol 19 (28) ◽

pp. 18407-18415 ◽

Cited By ~ 11

Author(s):

Eungkyu Lee ◽

Tengfei Luo

Keyword(s):

Molecular Dynamics ◽

Molecular Dynamics Simulation ◽

Optical Phonon ◽

Thermal Transport ◽

Intermediate Layer ◽

Dynamics Simulation ◽

Optical Phonons ◽

Spectral Matching

A study with molecular dynamics simulation shows that optical phonon vibrational spectral matching by an intermediate layer can significantly impact thermal transport across diatomic solid interfaces.

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Unconventional relaxation of hydrodynamic modes in anharmonic chains under strong pressure fluctuations

Journal of Physics A Mathematical and Theoretical ◽

10.1088/1751-8121/ac463d ◽

2021 ◽

Author(s):

Da Ke ◽

Wei Zhong ◽

Sergey V Dmitriev ◽

Daxing Xiong

Keyword(s):

Thermal Transport ◽

Numerical Scheme ◽

Pressure Fluctuations ◽

Hydrodynamic Theory ◽

Hydrodynamic Modes ◽

Large Pressure

Abstract We develop an effective numerical scheme to capture hydrodynamic modes in general classical anharmonic chains. This scheme is based on the hydrodynamic theory suggested by Ernst-Hauge-van Leeuwen, which takes full role of pressure fluctuations into account. With this scheme we show that the traditional pictures given by the current nonlinear fluctuating hydrodynamic theory are valid only when the system's pressure is zero and the pressure fluctuations are weak. For nonvanishing pressure, the hydrodynamic modes can, however, respond to small and large pressure fluctuations and relax in some distinct manners. Our results shed new light on understanding thermal transport from the perspective of hydrodynamic theory.

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