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

Yasufumi Araki, Takahiro Misawa, Kentaro Nomura

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


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 the edge gets maximized, demanded by the band topology of the one-dimensional helical edge states.

Original languageEnglish
Article number023195
JournalPhysical Review Research
Issue number2
Publication statusPublished - May 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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