Cummings, Aron W. and Garcia, Jose H. and Fabian, Jaroslav and Roche, Stephan (2017) Giant Spin Lifetime Anisotropy in Graphene Induced by Proximity Effects. PHYSICAL REVIEW LETTERS, 119 (20): 206601. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
We report on fundamental aspects of spin dynamics in heterostructures of graphene and transition metal dichalcogenides (TMDCs). By using realistic models derived from first principles we compute the spin lifetime anisotropy, defined as the ratio of lifetimes for spins pointing out of the graphene plane to those pointing in the plane. We find that the anisotropy can reach values of tens to hundreds, which is unprecedented for typical 2D systems with spin-orbit coupling and indicates a qualitatively new regime of spin relaxation. This behavior is mediated by spin-valley locking, which is strongly imprinted onto graphene by TMDCs. Our results indicate that this giant spin lifetime anisotropy can serve as an experimental signature of materials with strong spin-valley locking, including graphene-TMDC hetero-structures and TMDCs themselves. Additionally, materials with giant spin lifetime anisotropy can provide an exciting platform for manipulating the valley and spin degrees of freedom, and for designing novel spintronic devices.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DER-WAALS HETEROSTRUCTURES; QUANTUM TRANSPORT; CRYSTALS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:19 |
| Last Modified: | 28 Feb 2019 10:15 |
| URI: | https://pred.uni-regensburg.de/id/eprint/1850 |
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