Anomalous photon thermal Hall effect
Annika Ott, Svend‐Age Biehs, Philippe Ben‐Abdallah
Abstract
We predict an anomalous thermal Hall effect (ATHE) mediated by photons in networks of Weyl semimetals. Contrary to the photon thermal Hall effect in magneto-optical systems which requires the application of an external magnetic field the ATHE in a Weyl semimetals network is an intrinsic property of these systems. Since the Weyl semimetals can exhibit a strong nonreciprocal response in the infrared over a broad spectral range, the magnitude of thermal Hall flux in these systems can be relatively large compared to the primary flux. This ATHE paves the way for a directional control of heat flux by locally tuning the magnitude of temperature field without changing the direction of temperature gradient.