PhysRevResearch.1.013002.pdf (4.48 MB)

Collective spin dynamics of Z2 vortex crystals in triangular Kitaev-Heisenberg antiferromagnets

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journal contribution
posted on 19.08.2019, 15:45 by Mengqun Li, Natalia B Perkins, Ioannis Rousochatzakis
We show that the mesoscopic incommensurate Z2 vortex crystals proposed for layered triangular anisotropic magnets can be most saliently identified by two distinctive signatures in dynamical spin response experiments: the presence of pseudo-Goldstone phononlike modes at low frequencies ω, associated with the collective vibrations of the vortex cores, and a characteristic multiscattered intensity profile at higher ω, arising from a large number of Bragg reflections and magnon band gaps. These are direct fingerprints of the large vortex sizes and magnetic unit cells and the solitonic spin profile around the vortex cores.

Funding

U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award No. DE-SC0018056

History

School

  • Science

Department

  • Physics

Published in

Physical Review Research

Volume

1

Issue

1

Publisher

American Physical Society

Version

VoR (Version of Record)

Acceptance date

26/06/2019

Publication date

2019-08-09

Copyright date

2019

eISSN

2643-1564

Language

en

Depositor

Dr Ioannis Rousochatzakis

Article number

013002

Licence

Exports

Loughborough Publications

Categories

Licence

Exports