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Title

Room-temperature spin hall effect in graphene/MoS 2 van der Waals heterostructures

AuthorsSafeer, C. K.; Ingla-Aynes, Josep; Herling, Franz; Garcia, Jose H. ; Vila, Marc ; Ontoso, Nerea; Calvo, M. Reyes; Roche, Stephan ; Hueso, Luis E.; Casanova, Fèlix
KeywordsGraphene
Transition-metal dichalcogenides
Spin−orbit proximity
Spin Hall effect
Rashba−Edelstein effect
Issue Date2019
PublisherAmerican Chemical Society
CitationNano Letters 19(2): 1074-1082 (2019)
AbstractGraphene 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.
Publisher version (URL)https://doi.org/10.1021/acs.nanolett.8b04368
URIhttp://hdl.handle.net/10261/209965
DOI10.1021/acs.nanolett.8b04368
Identifiersdoi: 10.1021/acs.nanolett.8b04368
issn: 1530-6984
Appears in Collections:(CIN2) Artículos
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