Transport signature of the magnetic Berezinskii-Kosterlitz-Thouless transition

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 NiPS${}_3$ and CrCl${}_3$.

arXiv comment15 pages, 2 figures, Submission to SciPost

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Cited by in corpus (12)

• Intrinsic 2D-XY ferromagnetism in a van der Waals monolayer
• Monolayer CrCl${}_3$ as an ideal Test Bed for the Universality Classes of 2D Magnetism
• Zeeman term for the Néel vector in a two sublattice antiferromagnet using Dzyaloshinsky-Moriya interaction and magnetic field
• Berezinskii-Kosterlitz-Thouless transition transport in spin-triplet superconductor
• Superfluid Spin Transistor
• Spin and thermal transport and critical phenomena in three-dimensional antiferromagnets
• Signature of BKT-like spin transport in a quasi-2D antiferromagnet BaNi${}_2$V${}_2$O${}_8$
• Spin Hall effect of vorticity
• Nonreciprocal superfluidlike topological spin transport
• Spin interactions and topological magnonics in chromium trihalide CrClBrI
• Magnetoresistance driven by the magnetic Berezinskii-Kosterlitz-Thouless transition
• Spin-qubit Noise Spectroscopy of Magnetic Berezinskii-Kosterlitz-Thouless Physics