Bilateral substrate effect on the thermal conductivity of two-dimensional silicon

Nanoscale
Xiaoliang ZhangMing Hu

Abstract

Silicene, the silicon-based counterpart of graphene, has received exceptional attention from a wide community of scientists and engineers in addition to graphene, due to its unique and fascinating physical and chemical properties. Recently, the thermal transport of the atomic thin Si layer, critical to various applications in nanoelectronics, has been studied; however, to date, the substrate effect has not been investigated. In this paper, we present our nonequilibrium molecular dynamics studies on the phonon transport of silicene supported on different substrates. A counter-intuitive phenomenon, in which the thermal conductivity of silicene can be either enhanced or suppressed by changing the surface crystal plane of the substrate, has been observed. This phenomenon is fundamentally different from the general understanding of supported graphene, a representative two-dimensional material, in which the substrate always has a negative effect on the phonon transport of graphene. By performing phonon polarization and spectral energy density analysis, we explain the underlying physics of the new phenomenon in terms of the different impacts on the dominant phonons in the thermal transport of silicene induced by the substrate: the dra...Continue Reading

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Citations

Jan 21, 2016·Scientific Reports·Ruixia SuZhigang Zheng
Aug 13, 2015·Physical Chemistry Chemical Physics : PCCP·Jingchao ZhangYanan Yue
Feb 16, 2017·Physical Chemistry Chemical Physics : PCCP·Yang HongXiao Cheng Zeng
Feb 26, 2016·Scientific Reports·Xiaoliang ZhangMing Hu
Jun 24, 2017·Physical Chemistry Chemical Physics : PCCP·Qing-Xiang PeiYong-Wei Zhang
Feb 3, 2018·Small·Guangzhao Qin, Ming Hu
Mar 12, 2016·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Chao-Yu ChenZhi-Xin Guo
Feb 17, 2018·Nanoscale·Ning WeiJige Chen
Feb 29, 2020·Physical Chemistry Chemical Physics : PCCP·Jiang-Jiang MaBao-Tian Wang
Oct 20, 2018·Physical Chemistry Chemical Physics : PCCP·Liu CuiXiaoze Du
Mar 3, 2021·Physical Chemistry Chemical Physics : PCCP·Jie SunQian Wang

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