Intrinsic spin Nernst effect of magnons in a noncollinear antiferromagnet

We investigate the intrinsic magnon spin current in a noncollinear antiferromagnetic insulator. We introduce a definition of the magnon spin current in a noncollinear antiferromagnet and find that it is in general nonconserved, but for certain symmetries and spin polarizations the averaged effect of...

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Bibliographic Details
Published inPhysical review research Vol. 2; no. 1; p. 013079
Main Authors Li, Bo, Sandhoefner, Shane, Kovalev, Alexey A.
Format Journal Article
LanguageEnglish
Published United States American Physical Society 24.01.2020
Subjects
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Magnetic order
Magnetism
MATERIALS SCIENCE
Spintronics
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ISSN2643-1564
2643-1564
DOI10.1103/PhysRevResearch.2.013079

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Summary:We investigate the intrinsic magnon spin current in a noncollinear antiferromagnetic insulator. We introduce a definition of the magnon spin current in a noncollinear antiferromagnet and find that it is in general nonconserved, but for certain symmetries and spin polarizations the averaged effect of nonconserving terms can vanish. We formulate a general linear response theory for magnons in noncollinear antiferromagnets subject to a temperature gradient and analyze the effect of symmetries on the response tensor. We apply this theory to single-layer potassium iron jarosite KFe3(OH)6(SO4)2 and predict a measurable spin current response.
Bibliography:USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
SC0014189
ISSN:2643-1564
2643-1564
DOI:10.1103/PhysRevResearch.2.013079