Superfluid Spin Transport through Easy-Plane Ferromagnetic Insulators

ORAL

Abstract

Superfluid spin transport | dissipationless transport of spin | is theoretically studied in a ferromagnetic insulator with easy-plane anisotropy. We consider an open geometry where spin current is injected into the ferromagnet from one side by a metallic reservoir with a nonequilibrium spin accumulation, and ejected into another metallic reservoir located downstream. Spin transport through the device is studied using a combination of magnetoelectric circuit theory, Landau-Lifshitz-Gilbert phenomenology, and microscopic linear-response theory. We discuss how spin superfluidity can be probed using a magnetically-mediated electron-drag experiment.

*This work was supported in part by FAME (an SRC STARnet center sponsored by MARCO and DARPA), the NSF under Grant No. DMR-0840965, and Grant No. 228481 from the Simons Foundation.

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Authors

  • So Takei

    • University of California Los Angeles

  • Yaroslav Tserkovnyak

    • Department of Physics and Astronomy, University of California, Los Angeles
    • Univ of California - Los Angeles
    • University of California, Los Angeles
    • UCLA
    • University of California Los Angeles