Different effect of evanescent modes on acoustic phonon transport in different types of a three-dimensional quantum wire

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 t...

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Bibliographic Details
Published inPhysics letters. A Vol. 378; no. 34; pp. 2539 - 2544
Main Authors Li, Ke-Min, Xie, Zhong-Xiang, Su, Ka-Lin, Luo, Wen-Hua, Liao, Gao-Hua, Zhang, Yong
Format Journal Article
LanguageEnglish
Published Elsevier B.V 04.07.2014
Subjects
Acoustic phonon transport
Evanescent modes
Thermal conductance
Three-dimensional quantum wire
Transmission coefficient
Three-dimensional quantum wire
Transmission coefficient
Evanescent modes
Thermal conductance
Acoustic phonon transport
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Summary: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.
ISSN:0375-9601
1873-2429
DOI:10.1016/j.physleta.2014.06.034