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arXiv · 1912.01545

Spectroscopy of Majorana modes of non-Abelian vortices in Kitaev's chiral spin liquid

Masafumi Udagawa·Roderich Moessner
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Abstract

We study the temperature (T) dependence of the dynamical structure factor of the chiral spin liquid phase of Kitaev's honeycomb model. We find, using a recently developed analytical approach, direct signatures of the Majorana modes associated with the non-Abelian Z_2 vortices (visons). In particular, a characteristic multiplet of discrete peaks at low but nonzero-T and its field dependence reflect the existence of thermally activated visons whose varying separation yields different splittings of the Majorana `zero' modes. The resonant processes involved are specific to the Majorana modes, and will persist even in the presence of weak non-integrable interactions.

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Masafumi Udagawa, Roderich Moessner. 2019-12-03. Spectroscopy of Majorana modes of non-Abelian vortices in Kitaev's chiral spin liquid. https://arxiv.org/abs/1912.01545

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