Abstract:
:Dirac materials such as graphene and topological insulators (TIs) are known to have unique electronic and spintronic properties. We combine graphene with TIs in van der Waals heterostructures to demonstrate the emergence of a strong proximity-induced spin-orbit coupling in graphene. By performing spin transport and precession measurements supported by ab initio simulations, we discover a strong tunability and suppression of the spin signal and spin lifetime due to the hybridization of graphene and TI electronic bands. The enhanced spin-orbit coupling strength is estimated to be nearly an order of magnitude higher than in pristine graphene. These findings in graphene-TI heterostructures could open interesting opportunities for exploring exotic physical phenomena and new device functionalities governed by topological proximity effects.
journal_name
Sci Advjournal_title
Science advancesauthors
Khokhriakov D,Cummings AW,Song K,Vila M,Karpiak B,Dankert A,Roche S,Dash SPdoi
10.1126/sciadv.aat9349subject
Has Abstractpub_date
2018-09-21 00:00:00pages
eaat9349issue
9issn
2375-2548pii
aat9349journal_volume
4pub_type
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