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- W4287003523 abstract "A vison is an excitation of the Kitaev spin liquid which carries a $mathbb Z_2$ gauge flux. While immobile in the pure Kitaev model, it becomes a dynamical degree of freedom in the presence of perturbations. We study an isolated vison in the isotropic Kitaev model perturbed by a small external magnetic field $h$, an offdiagonal exchange interactions $Gamma$ and a Heisenberg coupling $J$. In the ferromagnetic Kitaev model, the dressed vison obtains a dispersion linear in $Gamma$ and $h$ and a fully universal low-$T$ mobility, $mu=6 v_m^2/T^{2}$, where $v_m$ is the velocity of Majorana fermions. In contrast, in the antiferromagnetic Kitaev model interference effects suppress the coherent propagation and an incoherent Majorana-assisted hopping leads to a $T$-independent mobility. The motion of a single vison due to Heisenberg interactions is strongly suppressed for both signs of the Kitaev coupling. Vison bands in the antiferromagnetic Kitaev models can be topological and may lead to a characteristic features in thermal Hall effects in Kitaev materials." @default.
- W4287003523 created "2022-07-25" @default.
- W4287003523 creator A5012385096 @default.
- W4287003523 creator A5029195586 @default.
- W4287003523 date "2021-09-01" @default.
- W4287003523 modified "2023-09-26" @default.
- W4287003523 title "Dynamics of visons and thermal Hall effect in perturbed Kitaev models" @default.
- W4287003523 doi "https://doi.org/10.48550/arxiv.2109.00250" @default.
- W4287003523 hasPublicationYear "2021" @default.
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