Negative differential thermal conductance between Weyl semimetals nanoparticles through vacuum

Autor:	Yasong Sun, Yang Hu, Kezhang Shi, Jihong Zhang, Dudong Feng, Xiaohu Wu
Rok vydání:	2022
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) FOS: Physical sciences Condensed Matter Physics Mathematical Physics Atomic and Molecular Physics and Optics
Zdroj:	Physica Scripta. 97:095506
ISSN:	1402-4896 0031-8949
DOI:	10.1088/1402-4896/ac8843
Popis:	In this work, the near-field radiative heat transfer (NFRHT) between two Weyl semimetal (WSM) nanoparticles (NPs) is investigated. The numerical results show that negative differential thermal conductance (NDTC) effect can be obtained in this system, i.e., when the temperature of the emitter is fixed, the heat flux does not decrease monotonically with the increase of the temperature of the receiver. Specifically, when the temperature of the emitter is 300 K, the heat flux is identical when the temperature of the receiver is 50 K or 280 K. The NDTC effect is attributed to the fact that the permittivity of the WSMs changes with the temperature. The coupling effects of polarizability of two WSM NPs have been further identified at different temperature to reveal the physical mechanism of the NDTC effect. In addition, the NFRHT between two WSM NPs can be greatly enhanced by exciting the localized plasmon and circular modes. This work indicates that the WSMs maybe promising candidate materials for manipulating NFRHT.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff81c310a98ebfa319297aa773d66b91 https://doi.org/10.1088/1402-4896/ac8843 Zobrazit plný text záznamu