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Article overview
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Magnon spin-Hall magnetoresistance of a gapped quantum paramagnet | | Camilo Ulloa
; R. A. Duine
; | | Date: |
12 Oct 2017 | | Abstract: | Motivated by recent experimental work we consider spin transport between a
normal metal and a gapped quantum paramagnet. We model the latter as the
magnonic Mott-insulating phase of an easy-plane ferromagnetic insulator. We
evaluate the spin current mediated by the interface exchange coupling between
the ferromagnet and the adjacent normal metal. For the strongly- interacting
magnons that we consider, this spin current gives rise to a spin-Hall
magnetoresistance that strongly depends on the magnitude of the magnetic field,
rather than its direction. This work may motivate electrical detection of the
phases of quantum magnets and the incorporation of such materials into
spintronic devices. | | Source: | arXiv, 1710.4431 | | Services: | Forum | Review | PDF | Favorites | |
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