ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Construction and mechanism analysis on nanoscale thermal cloak by in-situ annealing silicon carbide film |
Jian Zhang(张健), Hao-Chun Zhang(张昊春)†, Zi-Liang Huang(黄子亮), Wen-Bo Sun(孙文博), and Yi-Yi Li(李依依) |
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China |
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Abstract In recent years, there is a strong interest in thermal cloaking at the nanoscale, which has been achieved by using graphene and crystalline silicon films to build the nanoscale thermal cloak according to the classical macroscopic thermal cloak model. Silicon carbide, as a representative of the third-generation semiconductor material, has splendid properties, such as the high thermal conductivity and the high wear resistance. Therefore, in the present study, we build a nanoscale thermal cloak based on silicon carbide. The cloaking performance and the perturbation of the functional area to the external temperature filed are analyzed by the ratio of thermal cloaking and the response temperature, respectively. It is demonstrated that silicon carbide can also be used to build the nanoscale thermal cloak. Besides, we explore the influence of inner and outer radius on cloaking performance. Finally, the potential mechanism of the designed nanoscale thermal cloak is investigated by calculating and analyzing the phonon density of states (PDOS) and mode participation rate (MPR) within the structure. We find that the main reason for the decrease in the thermal conductivity of the functional area is phonon localization. This study extends the preparation method of nanoscale thermal cloaks and can provide a reference for the development of other nanoscale devices.
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Received: 19 July 2021
Revised: 19 August 2021
Accepted manuscript online: 18 September 2021
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PACS:
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44.10.+i
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(Heat conduction)
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65.40.-b
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(Thermal properties of crystalline solids)
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67.25.dp
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(Films)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51776050). |
Corresponding Authors:
Hao-Chun Zhang
E-mail: hczhang@hit.edu.cn
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Cite this article:
Jian Zhang(张健), Hao-Chun Zhang(张昊春), Zi-Liang Huang(黄子亮), Wen-Bo Sun(孙文博), and Yi-Yi Li(李依依) Construction and mechanism analysis on nanoscale thermal cloak by in-situ annealing silicon carbide film 2022 Chin. Phys. B 31 014402
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