Theoretical Paradigm for Thermal Rectification via Phonon Filtering and Spectral Confinement

Physical Review Letters
Brian F Donovan, Ronald J Warzoha

Abstract

Significant thermal rectification has the potential to revolutionize approaches to controlled heat flow and enable breakthrough technologies such as phononic computing. We demonstrate a framework based on phonon population confinement and filtering that has potential to reach rectifications that are an order of magnitude larger than previous literature. With the use of a straightforward modification of the phonon gas model, we illustrate theoretical thermal rectification in a thin film of diamond (1-10 nm) graded to dimensions >1  μm of between 25% and 250%. Utilizing this mechanism for thermal rectification sets the stage for significant development in thermal devices.

References

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Feb 24, 2015·Nature Nanotechnology·Maria José Martínez-PérezFrancesco Giazotto
Oct 2, 2017·The Review of Scientific Instruments·Ronald J Warzoha, Brian F Donovan

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Citations

Nov 21, 2020·Physical Review. E·Chuang ZhangSongze Chen
May 28, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·P R N Falcão, M L Lyra

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