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Spin Superfluidity in Biaxial Antiferromagnetic Insulators
Norwegian University of Science and Technology, Norway.
Norwegian University of Science and Technology, Norway.
Norwegian University of Science and Technology, Norway.ORCID iD: 0000-0001-5551-8980
Norwegian University of Science and Technology, Norway.
2017 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 118, article id 137201Article in journal, Letter (Refereed) Published
Abstract [en]

Antiferromagnets may exhibit spin superfluidity since the dipole interaction is weak. We seek toestablish that this phenomenon occurs in insulators such as NiO, which is a good spin conductor accordingto previous studies. We investigate nonlocal spin transport in a planar antiferromagnetic insulator witha weak uniaxial anisotropy. The anisotropy hinders spin superfluidity by creating a substantial thresholdthat the current must overcome. Nevertheless, we show that applying a high magnetic field removes thisobstacle near the spin-flop transition of the antiferromagnet. Importantly, the spin superfluidity can thenpersist across many micrometers, even in dirty samples.

Place, publisher, year, edition, pages
2017. Vol. 118, article id 137201
National Category
Condensed Matter Physics
Research subject
Physics, Condensed Matter Physics
Identifiers
URN: urn:nbn:se:lnu:diva-63795DOI: 10.1103/PhysRevLett.118.137201OAI: oai:DiVA.org:lnu-63795DiVA, id: diva2:1095287
Available from: 2017-05-12 Created: 2017-05-12 Last updated: 2017-05-15Bibliographically approved

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Holmqvist, Cecilia

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