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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 (engelsk)Inngår i: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 118, artikkel-id 137201Artikkel i tidsskrift, Letter (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2017. Vol. 118, artikkel-id 137201
HSV kategori
Forskningsprogram
Fysik, Kondenserade materians fysik
Identifikatorer
URN: urn:nbn:se:lnu:diva-63795DOI: 10.1103/PhysRevLett.118.137201OAI: oai:DiVA.org:lnu-63795DiVA, id: diva2:1095287
Tilgjengelig fra: 2017-05-12 Laget: 2017-05-12 Sist oppdatert: 2017-05-15bibliografisk kontrollert

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