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20 August 2020 Spin-orbit phenomena in proximitized graphene
L. Antonio Benítez, Williams Savero-Torres, Juan F. Sierra, Aloïs Arrighi, Matias Timmermans, Jose H. Garcia, Stephan Roche, Marius V. Costache, Sergio O. Valenzuela
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Proceedings Volume 11470, Spintronics XIII; 114702C (2020) https://doi.org/10.1117/12.2569257
Event: SPIE Nanoscience + Engineering, 2020, Online Only
Abstract
When graphene is in proximity to a transition metal dichalcogenide (TMDC), it acquires an enhanced spin-orbit interaction (SOI). Here, I will discuss the relevant consequences of this unique type of SOI for spin manipulation in graphene-TMDC heterostructures. Firstly, I will present our recent experiments which demonstrate how the spin dynamics in graphene is strongly modified by the proximity to a TMDC. The results show that the spin lifetime depends on the spin orientation, and it is larger for spins pointing out of the graphene’s plane compared with the spins pointing in-plane. I will further present an unprecedented electric-field tunability of such anisotropic features in graphene-WS2 heterostructures. Finally, I will demonstrate that the enhanced SOI leads to spin-charge interconversion in graphene. By using spin precession measurements, we can separate the contributions of the spin Hall and the spin galvanic effects.
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L. Antonio Benítez, Williams Savero-Torres, Juan F. Sierra, Aloïs Arrighi, Matias Timmermans, Jose H. Garcia, Stephan Roche, Marius V. Costache, and Sergio O. Valenzuela "Spin-orbit phenomena in proximitized graphene", Proc. SPIE 11470, Spintronics XIII, 114702C (20 August 2020); https://doi.org/10.1117/12.2569257
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KEYWORDS
Graphene
Heterojunctions
Spin dynamics
Transition metals
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