Collective spin dynamics of ${\mathbb{Z}}_{2}$ vortex crystals in triangular KitaevHeisenberg antiferromagnets
Abstract
We show that the mesoscopic incommensurate Z_{2} 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 pseudoGoldstone 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.
 Authors:

 Univ. of Minnesota, Minneapolis, MN (United States)
 Loughborough Univ. (United Kingdom)
 Publication Date:
 Research Org.:
 Univ. of Minnesota, Minneapolis, MN (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC), Basic Energy Sciences (BES)
 OSTI Identifier:
 1549200
 Alternate Identifier(s):
 OSTI ID: 1637705
 Grant/Contract Number:
 SC0018056
 Resource Type:
 Published Article
 Journal Name:
 Physical Review Research
 Additional Journal Information:
 Journal Volume: 1; Journal Issue: 1; Journal ID: ISSN 26431564
 Publisher:
 American Physical Society (APS)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; frustrated magnetism; magnetic vortices; spin dynamics; strongly correlated systems; HolsteinPrimakoff method
Citation Formats
Li, Mengqun, Perkins, Natalia B., and Rousochatzakis, Ioannis. Collective spin dynamics of Z2 vortex crystals in triangular KitaevHeisenberg antiferromagnets. United States: N. p., 2019.
Web. doi:10.1103/PhysRevResearch.1.013002.
Li, Mengqun, Perkins, Natalia B., & Rousochatzakis, Ioannis. Collective spin dynamics of Z2 vortex crystals in triangular KitaevHeisenberg antiferromagnets. United States. https://doi.org/10.1103/PhysRevResearch.1.013002
Li, Mengqun, Perkins, Natalia B., and Rousochatzakis, Ioannis. Fri .
"Collective spin dynamics of Z2 vortex crystals in triangular KitaevHeisenberg antiferromagnets". United States. https://doi.org/10.1103/PhysRevResearch.1.013002.
@article{osti_1549200,
title = {Collective spin dynamics of Z2 vortex crystals in triangular KitaevHeisenberg antiferromagnets},
author = {Li, Mengqun and Perkins, Natalia B. and Rousochatzakis, Ioannis},
abstractNote = {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 pseudoGoldstone 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.},
doi = {10.1103/PhysRevResearch.1.013002},
journal = {Physical Review Research},
number = 1,
volume = 1,
place = {United States},
year = {2019},
month = {8}
}
https://doi.org/10.1103/PhysRevResearch.1.013002
Figures / Tables:
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Works referencing / citing this record:
Finitetemperature properties of the KitaevHeisenberg models on kagome and triangular lattices studied by improved finitetemperature Lanczos methods
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 Morita, Katsuhiro; Tohyama, Takami
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Finitetemperature properties of the KitaevHeisenberg models on kagome and triangular lattices studied by improved finitetemperature Lanczos methods
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 Morita, Katsuhiro; Tohyama, Takami
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