Near-field thermal radiation between SiO2/Weyl semimetal multilayers

Abstract

Weyl semimetals (WSMs) have attracted increasing attention due to their intrinsic anomalous Hall effect and the chiral anomalous effect. In this paper, we investigate the near-field radiative heat transfer (NFRHT) between two SiO2/WSM multilayers. We find that, the SiO2/WSM multilayers support hybrid photon modes, which enable a higher heat flux than the WSM configuration and the SiO2 configuration as well. The tunable number of Weyl nodes and Fermi level of the WSM plates empower the heat transfer coefficient (HTC) to be dynamically controlled. In addition, regarding the influence of the geometry, there exists a tradeoff in terms of the dependence of filling ratio, and a larger period number is adverse to the improvement of NFRHT. We hope that our work will be beneficial for thermal management and energy utilization in nanoscale multilayer WSM-based systems.