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

Yasufumi Araki, Takahiro Misawa, Kentaro Nomura
2020 Physical Review Research  

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https://web.archive.org/web/20220617074154/https://journals.aps.org/prresearch/pdf/10.1103/PhysRevResearch.2.023195

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We theoretically show 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
more » ... he edge gets maximized, demanded by the band topology of the one-dimensional helical edge states.
doi:10.1103/physrevresearch.2.023195 fatcat:evv2xnjn2rbotc6s2by5nhaxsq
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Yasufumi Araki, Takahiro Misawa, Kentaro Nomura. "Dynamical spin-to-charge conversion on the edge of quantum spin Hall insulator." Physical Review Research 2.2 (2020)