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Wolter, Bernd B\\\"uchner, Christian Hess, Lukas Janssen, Matthias Gillig, Sebastian Gass, Vilmos Kocsis, Weiliang Yao, Xiaochen Hong, Yuan Li","submitted_at":"2023-06-29T14:13:55Z","abstract_excerpt":"The recent report of a half-quantized thermal Hall effect in the Kitaev material $\\alpha$-RuCl$_3$ has sparked a strong debate on whether it is generated by Majorana fermion edge currents or whether other more conventional mechanisms involving magnons or phonons are at its origin. A more direct evidence for Majorana fermions which could be expected to arise from a contribution to the longitudinal heat conductivity $\\kappa_{xx}$ at $T\\rightarrow0$ is elusive due to a very complex magnetic field dependence of $\\kappa_{xx}$. 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