Li, Lijun, Zhang, Jin, Myeong, Gyuho et al. (11 more authors) (2020) Gate-Tunable Reversible Rashba−Edelstein Effect in a Few-Layer Graphene/2H-TaS2 Heterostructure at Room Temperature. ACS Nano. pp. 5251-5259. ISSN 1936-0851
Abstract
We report the observation of current-induced spin polarization, the Rashba−Edelstein effect (REE), and its Onsager reciprocal phenomenon, the spin galvanic effect (SGE), in a few-layer graphene/2H-TaS2 heterostructure at room temperature. Spin-sensitive electrical measurements unveil full spin-polarization reversal by an applied gate voltage. The observed gate-tunable charge-to-spin conversion is explained by the ideal work function mismatch between 2H-TaS2 and graphene, which allows for a strong interface-induced Bychkov−Rashba interaction with a spin-gap reaching 70 meV, while keeping the Dirac nature of the spectrum intact across electron and hole sectors. The reversible electrical generation and control of the nonequilibrium spin polarization vector, not previously observed in a nonmagnetic material, are elegant manifestations of emergent two-dimensional Dirac Fermions with robust spin-helical structure. Our experimental findings, supported by first-principles relativistic electronic structure and transport calculations, demonstrate a route to design low-power spin−logic circuits from layered materials.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 American Chemical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details. |
Keywords: | graphene,2D materials,edelstein effect,Rashba edelstein effect,spin galvanic effect,spintronics |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Funding Information: | Funder Grant number THE ROYAL SOCIETY URF\R\191021 |
Depositing User: | Pure (York) |
Date Deposited: | 06 May 2020 08:50 |
Last Modified: | 16 Oct 2024 16:34 |
Published Version: | https://doi.org/10.1021/acsnano.0c01037 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1021/acsnano.0c01037 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:160331 |