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Dynamical spin-to-charge conversion on the edge of quantum spin Hall insulator

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arxiv 1912.11957 v2 pith:KA3MG3YJ submitted 2019-12-27 cond-mat.mes-hall

Dynamical spin-to-charge conversion on the edge of quantum spin Hall insulator

Yasufumi Araki , Takahiro Misawa , Kentaro Nomura This is my paper
classification cond-mat.mes-hall
keywords edgeqshispinconversiondrivendynamicsgetshall
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We theoretically manifest that the edge of a quantum spin Hall insulator (QSHI), attached to an insulating ferromagnet (FM), can realize a highly efficient spin-to-charge conversion. Based on a one-dimensional QSHI-FM junction, the electron dynamics on the QSHI edge is analyzed, driven by a magnetization dynamics in the FM. Under a large gap opening on the edge from the magnetic exchange coupling, we find that the spin injection into the QSHI edge gets suppressed while the charge current driven on the edge gets maximized, demanded by the band topology of the one-dimensional helical edge states.

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