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Special Issue:
SPECIAL TOPIC — Heat conduction and its related interdisciplinary areas
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| SPECIAL TOPIC — Heat conduction and its related interdisciplinary areas |
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Giant thermal rectification beyond structural asymmetry via current-induced nonreciprocity effects |
| Jiayao Zhang(张佳瑶)1, Yu Hao(郝雨)1, Bowen Xiong(熊博文)1, Shanhe Su(苏山河)3, and Zhimin Yang(杨智敏)1,2,† |
1 School of Physics and Electronic Information, Yan'an University, Yan'an 716000, China;
2 Shaanxi Key Laboratory of Intelligent Processing for Big Energy Data, Yan'an University, Yan'an 716000, China;
3 Department of Physics, Xiamen University, Xiamen 361005, China |
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Abstract Pursuing significant thermal rectification effect with minimal temperature differences is critical for thermal rectifiers. While asymmetric structures enable spectral matching, they inherently limit thermal rectification performance. To address this issue, we developed a thermal rectification structure comprising a current-biased graphene-coated silicon carbide (SiC) substrate paired with another graphene-coated SiC substrate separated by a nanoscale vacuum gap. A current-biased graphene sheet generates nonreciprocal effect that actively modulates radiative energy transfer. Our theoretical framework demonstrates that the current-biased graphene achieves a high thermal diode efficiency even under a modest temperature difference. Remarkably, the thermal diode efficiency exceeds 0.8 at a temperature difference of just 100 K (between 300 K and 400 K). These findings highlight the synergistic enhancement from graphene coatings and current biasing, providing a viable strategy for nanoscale thermal management applications.
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Received: 12 March 2025
Revised: 29 April 2025
Accepted manuscript online: 15 May 2025
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PACS:
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44.40.+a
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(Thermal radiation)
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71.36.+c
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(Polaritons (including photon-phonon and photon-magnon interactions))
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78.20.Bh
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(Theory, models, and numerical simulation)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 12364008), the Ph. D. Research Startup Foundation of Yan’an University (Grant No. YDBK2019-54), and the Yan’an High-level Talent Special Project (Grant No. 2019263166). |
Corresponding Authors:
Zhimin Yang
E-mail: zhiminyoung@hotmail.com
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Cite this article:
Jiayao Zhang(张佳瑶), Yu Hao(郝雨), Bowen Xiong(熊博文), Shanhe Su(苏山河), and Zhimin Yang(杨智敏) Giant thermal rectification beyond structural asymmetry via current-induced nonreciprocity effects 2025 Chin. Phys. B 34 094402
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