Different effect of evanescent modes on acoustic phonon transport in different types of a three-dimensional quantum wire |
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| Authors: | Ke-Min Li Zhong-Xiang Xie Ka-Lin Su Wen-Hua Luo Gao-Hua Liao Yong Zhang |
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| Institution: | 1. College of Physics and Electronics, Hunan Institute of Science and Technology, Yueyang 414004, China;2. Department of Mathematics and Physics, Hunan Institute of Technology, Hengyang 421002, China |
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| Abstract: | By the use of the scattering matrix method, we investigate the effect of evanescent modes on acoustic phonon transport and thermal conductance in both convex and concave type three-dimensional quantum wire. Our results show that the evanescent modes can enhance the transmission coefficient and the thermal conductance in the concave type three-dimensional quantum wire. However, for the convex type three-dimensional quantum wire, the evanescent modes can play adverse effect on the phonon transport. When the length of scattering region is large enough, for all types of three-dimensional quantum wire, the influence of evanescent modes on phonon transport becomes very weak. |
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| Keywords: | Evanescent modes Acoustic phonon transport Three-dimensional quantum wire Transmission coefficient Thermal conductance |
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