Kochan, Denis and Irmer, Susanne and Gmitra, Martin and Fabian, Jaroslav (2015) Resonant Scattering by Magnetic Impurities as a Model for Spin Relaxation in Bilayer Graphene. PHYSICAL REVIEW LETTERS, 115 (19): 196601. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
We propose that the observed spin relaxation in bilayer graphene is due to resonant scattering by magnetic impurities. We analyze a resonant scattering model due to adatoms on both dimer and nondimer sites, finding that only the former give narrow resonances at the charge neutrality point. Opposite to single-layer graphene, the measured spin-relaxation rate in the graphene bilayer increases with carrier density. Although it has been commonly argued that a different mechanism must be at play for the two structures, our model explains this behavior rather naturally in terms of different broadening scales for the same underlying resonant processes. Not only do our results-using robust and first-principles inspired parameters-agree with experiment, they also predict an experimentally testable sharp decrease of the spin-relaxation rate at high carrier densities.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CONDUCTION ELECTRONS; ROOM-TEMPERATURE; SPINTRONICS; GRAPHITE; SINGLE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 May 2019 10:17 |
| Last Modified: | 07 May 2019 10:17 |
| URI: | https://pred.uni-regensburg.de/id/eprint/4474 |
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