Theoretical Paradigm for Thermal Rectification via Phonon Filtering and Spectral Confinement

Brian F. Donovan and Ronald J. Warzoha
Phys. Rev. Lett. 124, 075903 – Published 21 February 2020
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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 >1μm of between 25% and 250%. Utilizing this mechanism for thermal rectification sets the stage for significant development in thermal devices.

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  • Received 14 August 2019
  • Accepted 30 January 2020

DOI:https://doi.org/10.1103/PhysRevLett.124.075903

Published by the American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Brian F. Donovan*

  • Physics Department, United States Naval Academy, Annapolis, Maryland 21402, USA

Ronald J. Warzoha

  • Department of Mechanical Engineering, United States Naval Academy, Annapolis, Maryland 21402, USA

  • *bdonovan@usna.edu

Comments & Replies

Comment on “Theoretical Paradigm for Thermal Rectification via Phonon Filtering and Spectral Confinement”

A. A. Maznev and Bai Song
Phys. Rev. Lett. 128, 129601 (2022)

Donovan and Warzoha Reply:

Brian F. Donovan and Ronald J. Warzoha
Phys. Rev. Lett. 128, 129602 (2022)

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Issue

Vol. 124, Iss. 7 — 21 February 2020

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