Thermal Hall conductivity of $\alpha$-RuCl$_3$

TL;DR

This paper reports the observation of thermal Hall conductivity in $$-RuCl$_3$, suggesting the presence of topological magnons and raising questions about the role of Majorana modes in heat transport.

Contribution

It provides experimental evidence of thermal Hall effects in $$-RuCl$_3$, highlighting the potential involvement of topological magnons and Majorana modes.

Findings

Thermal Hall conductivity observed over broad temperature and magnetic field ranges.

Indications of topological magnons contributing to heat conduction.

Questions raised about the role of Majorana modes in thermal transport.

Abstract

Thermal Hall conductivity originating from topological magnons is observed in the Kitaev candidate $\alpha$-RuCl$_3$ in broad intervals of temperature and in-plane magnetic field, raising questions on the role of the Majorana mode in heat conduction.