Exceptional dynamics of interacting spin liquids
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.
- Publication Date:
- Research Org.:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE; European Research Council (ERC); Swedish Research Council (SRC)
- OSTI Identifier:
- 1898183
- Alternate Identifier(s):
- OSTI ID: 1907988
- Grant/Contract Number:
- SC0012567; 742104; 335-2014-7424
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Research
- Additional Journal Information:
- Journal Name: Physical Review Research Journal Volume: 4 Journal Issue: 4; Journal ID: ISSN 2643-1564
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Quantum spin liquid; Spin dynamics; Spin liquid; Disordered systems; Topological materials; Neutron scattering
Citation Formats
Yang, Kang, Varjas, Daniel, Bergholtz, Emil J., Morampudi, Sid, and Wilczek, Frank. Exceptional dynamics of interacting spin liquids. United States: N. p., 2022.
Web. doi:10.1103/PhysRevResearch.4.L042025.
Yang, Kang, Varjas, Daniel, Bergholtz, Emil J., Morampudi, Sid, & Wilczek, Frank. Exceptional dynamics of interacting spin liquids. United States. https://doi.org/10.1103/PhysRevResearch.4.L042025
Yang, Kang, Varjas, Daniel, Bergholtz, Emil J., Morampudi, Sid, and Wilczek, Frank. Mon .
"Exceptional dynamics of interacting spin liquids". United States. https://doi.org/10.1103/PhysRevResearch.4.L042025.
@article{osti_1898183,
title = {Exceptional dynamics of interacting spin liquids},
author = {Yang, Kang and Varjas, Daniel and Bergholtz, Emil J. and Morampudi, Sid and Wilczek, Frank},
abstractNote = {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.},
doi = {10.1103/PhysRevResearch.4.L042025},
journal = {Physical Review Research},
number = 4,
volume = 4,
place = {United States},
year = {Mon Nov 14 00:00:00 EST 2022},
month = {Mon Nov 14 00:00:00 EST 2022}
}
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