Issue 2, 2023

Giant thermal switching in ferromagnetic VSe2 with programmable switching temperature

Abstract

Active and reversible modulation of thermal conductivity can realize efficient heat energy management in many applications such as thermoelectrics. Using first-principles calculations, this study reports a giant thermal switching ratio of 12, much higher than previously reported values, in monolayer 2H-VSe2 above room temperature. Detailed analysis indicates that the high thermal switching ratio is dominated by the ferromagnetic ordering induced phonon bandgap, which significantly suppresses the phonon–phonon scattering phase space across the entire vibration spectrum. The thermal switching in bulk 2H-VSe2 is also investigated and the thermal switching ratio reaches 9.2 at the magnetic transition temperature. Both the phonon–phonon scattering space phase and phonon anharmonicity are responsible for the 9.2-fold thermal switching. This study advances the understanding of heat energy transport in two-dimensional ferromagnets, and also provides new insight into heat energy control and conversion.

Graphical abstract: Giant thermal switching in ferromagnetic VSe2 with programmable switching temperature

Supplementary files

Article information

Article type
Communication
Submitted
16 set 2022
Accepted
25 nov 2022
First published
25 nov 2022

Nanoscale Horiz., 2023,8, 202-210

Giant thermal switching in ferromagnetic VSe2 with programmable switching temperature

C. Wu, Y. Zhao, G. Zhang and C. Liu, Nanoscale Horiz., 2023, 8, 202 DOI: 10.1039/D2NH00429A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements