Journal article

Goldstone modes in the emergent gauge fields of a frustrated magnet

Abstract:: We consider magnon excitations in the spin-glass phase of geometrically frustrated antiferromagnets with weak exchange disorder, focusing on the nearest-neighbor pyrochlore-lattice Heisenberg model at large spin. The low-energy degrees of freedom in this system are represented by three copies of a U(1) emergent gauge field, related by global spin-rotation symmetry. We show that the Goldstone modes associated with spin-glass order are excitations of these gauge fields, and that the standard theory of Goldstone modes in Heisenberg spin glasses (due to Halperin and Saslow) must be modified in this setting.

Publication status:: Published

Peer review status:: Peer reviewed

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APA Style

Garratt, S. J., & Chalker, J. T. (2020). Goldstone modes in the emergent gauge fields of a frustrated magnet. Physical Review B, 101(2).

MLA Style

Garratt, S. J., and J. T. Chalker. “Goldstone Modes in the Emergent Gauge Fields of a Frustrated Magnet.” Physical Review B, vol. 101, no. 2, American Physical Society, 2020.

Chicago Style

Garratt, SJ, and JT Chalker. 2020. “Goldstone Modes in the Emergent Gauge Fields of a Frustrated Magnet.” Physical Review B 101 (2).
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Files:: GarrattChalkerAAM2020

(Accepted manuscript, 1.2MB, Terms of use)

Publisher copy:: 10.1103/PhysRevB.101.024413

Authors

+ Garratt, SJ More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Physics
Sub department:: Theoretical Physics
Oxford college:: St John's College
Role:: Author

+ Chalker, JT More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Physics
Sub department:: Theoretical Physics
Role:: Author
ORCID:: 0000-0003-4369-6071

Publisher:: American Physical Society
Journal:: Physical Review B More from this journal
Volume:: 101
Issue:: 2
Article number:: 024413
Publication date:: 2020-01-15
Acceptance date:: 2019-12-23
DOI:: 10.1103/PhysRevB.101.024413
EISSN:: 2469-9969
ISSN:: 2469-9950

Language:: English
Keywords:: cond-mat.dis-nn

FFR

cond-mat.str-el

cond-mat.stat-mech
Pubs id:: 1039406
Local pid:: pubs:1039406
Deposit date:: 2020-02-21

Terms of use

Copyright holder:: American Physical Society.
Copyright date:: 2020
Rights statement:: © 2020 American Physical Society.
Notes:: This is the accepted manuscript version of the article. The final version is available from American Physical Society at: https://doi.org/10.1103/PhysRevB.101.024413

Licence:: Terms and Conditions of Use for Oxford University Research Archive

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