Transport signature of the magnetic Berezinskii-Kosterlitz-Thouless transition

Se Kwon Kim, Suk Bum Chung

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12 Scopus citations

Abstract

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.

Original languageEnglish
Article number068
JournalSciPost Physics
Volume10
Issue number3
DOIs
StatePublished - 12 Mar 2021

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