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23 April 2024
 
  » arxiv » 2202.03445

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Exceptional dynamics of interacting spin liquids
Kang Yang ; Daniel Varjas ; Emil J. Bergholtz ; Sid Morampudi ; Frank Wilczek ;
Date 7 Feb 2022
AbstractWe show that interactions in quantum spin liquids can result in non-Hermitian phenomenology that differs qualitatively from mean-field expectations. We demonstrate this in two prominent cases through the effects of phonons and disorder on a Kitaev honeycomb model. Using analytic and numerical calculations, we show the generic appearance of exceptional points and rings depending on the symmetry of the system. Their existence is reflected in dynamical observables including the dynamic structure function measured in neutron scattering. The results point to new phenomenological features in realizable spin liquids that must be incorporated into the analysis of experimental data.
Source arXiv, 2202.03445
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