Transport signature of the magnetic Berezinskii-Kosterlitz-Thouless transition

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Motivated by recent experimental progress in 2D magnetism, we theoretically study spin transport in 2D easy-plane magnets at finite temperatures across the Berezinskii-Kosterlitz-Thouless (BKT) phase transition, by developing a duality mapping to the 2+1D electromagnetism with the full account of spin's finite lifetime. In particular, we find that the non-conservation of spin gives rise to a distinct signature across the BKT transition, with the spin current decaying with distance power-law (exponentially) below (above) the transition; this is detectable in the proposed experiment with NiPS3 and CrCl3.
Publisher
SCIPOST FOUNDATION
Issue Date
2021-03
Language
English
Article Type
Article
Citation

SCIPOST PHYSICS, v.10, no.3, pp.068

ISSN
2542-4653
DOI
10.21468/SCIPOSTPHYS.10.3.068
URI
http://hdl.handle.net/10203/285794
Appears in Collection
PH-Journal Papers(저널논문)
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