Efficient thermal diode with ballistic spacer

Physical Review. E
Shunda ChenGiulio Casati

Abstract

Thermal rectification is of importance not only for fundamental physics, but also for potential applications in thermal manipulations and thermal management. However, thermal rectification effect usually decays rapidly with system size. Here, we show that a mass-graded system, with two diffusive leads separated by a ballistic spacer, can exhibit large thermal rectification effect, with the rectification factor independent of system size. The underlying mechanism is explained in terms of the effective size-independent thermal gradient and the match or mismatch of the phonon bands. We also show the robustness of the thermal diode upon variation of the model's parameters. Our finding suggests a promising way for designing realistic efficient thermal diodes.

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Citations

Apr 20, 2019·Physical Review. E·Vinitha BalachandranDario Poletti
Jul 22, 2020·Physical Review. E·Tristram J Alexander
Dec 23, 2019·The Journal of Chemical Physics·Zhen LiTapio Ala-Nissila
Apr 18, 2021·Physical Review. E·M Romero-Bastida, Jeanette-Ivonne Amaya-Durán
Jun 18, 2021·Physical Review. E·Na'im KalantarDvira Segal

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