• 文献标题:   Room-Temperature Spin Hall Effect in Graphene/MoS2 van der Waals Heterostructures
  • 文献类型:   Article
  • 作  者:   SAFEER CK, INGLAAYNES J, HERLING F, GARCIA JH, VILA M, ONTOSO N, CALVO MR, ROCHE S, HUESO LE, CASANOVA F
  • 作者关键词:   graphene, transitionmetal dichalcogenide, spinorbit proximity, spin hall effect, rashbaedelstein effect
  • 出版物名称:   NANO LETTERS
  • ISSN:   1530-6984 EI 1530-6992
  • 通讯作者地址:   CIC nanoGUNE
  • 被引频次:   49
  • DOI:   10.1021/acs.nanolett.8b04368
  • 出版年:   2019

▎ 摘  要

Graphene is an excellent material for long-distance spin transport but allows little spin manipulation. Transition-metal dichalcogenides imprint their strong spin-orbit coupling into graphene via the proximity effect, and it has been predicted that efficient spin-to-charge conversion due to spin Hall and Rashba-Edelstein effects could be achieved. Here, by combining Hall probes with ferromagnetic electrodes, we unambiguously demonstrate experimentally the spin Hall effect in graphene induced by MoS2 proximity and for varying temperatures up to room temperature. The fact that spin transport and the spin Hall effect occur in different parts of the same material gives rise to a hitherto unreported efficiency for the spin-to-charge voltage output. Additionally, for a single graphene/MoS2 heterostructure-based device, we evidence a superimposed spin-to-charge current conversion that can be indistinguishably associated with either the proximity-induced Rashba-Edelstein effect in graphene or the spin Hall effect in MoS2. By a comparison of our results to theoretical calculations, the latter scenario is found to be the most plausible one. Our findings pave the way toward the combination of spin information transport and spin-to-charge conversion in two-dimensional materials, opening exciting opportunities in a variety of future spintronic applications.