Exceptional dynamics of interacting spin liquids

Kang Yang, Daniel Varjas, Emil J. Bergholtz, Sid Morampudi, Frank Wilczek

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

We 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 different phenomenological features in realizable spin liquids that must be incorporated into the analysis of experimental data and also indicate that spin liquids could be generically stable to wider classes of perturbations.

Original languageEnglish (US)
Article numberL042025
JournalPhysical Review Research
Volume4
Issue number4
DOIs
StatePublished - Oct 2022

ASJC Scopus subject areas

  • General Physics and Astronomy

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