Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5496766 | Physics Letters A | 2017 | 6 Pages |
Abstract
Thermal transport contributed by the torsional phonons in cylindrical nanowires is investigated by using the isotropic elastic continuum theory. The numerical calculations for both the concavity-shaped and convexity-shaped cylindrical structures are made to reveal the role of the evanescent modes. Results show that the evanescent modes play an important role in influencing the thermal transport in such structures. For the concavity-shaped cylindrical nanowire, the evanescent modes can enhance the thermal conductance by about 20 percent, while for the convexity-shaped cylindrical nanowire, the evanescent modes can suppress the thermal conductance by 6 percent. It is also shown that the influence of the evanescent modes on the thermal conductance is strongly related to the attenuation length of the evanescent modes. A brief analysis of these results is given.
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Physical Sciences and Engineering
Physics and Astronomy
Physics and Astronomy (General)
Authors
Zhong-Xiang Xie, Yong Zhang, Li-Fu Zhang, Dian-Yuan Fan,