Ringer, Sebastian and Hartl, Stefan and Rosenauer, Matthias and Voelkl, Tobias and Kadur, Maximilian and Hopperdietzel, Franz and Weiss, Dieter and Eroms, Jonathan (2018) Measuring anisotropic spin relaxation in graphene. PHYSICAL REVIEW B, 97 (20): 205439. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
We compare different methods to measure the anisotropy of the spin lifetime in graphene. In addition to out-of-plane rotation of the ferromagnetic electrodes and oblique spin precession, we present a Hanle experiment where the electron spins precess around either a magnetic field perpendicular to the graphene plane or around an in-plane field. In the latter case, electrons are subject to both in-plane and out-of-plane spin relaxation. To fit the data, we use a numerical simulation that can calculate precession with anisotropies in the spin lifetimes under magnetic fields in any direction. Our data show a small, but distinct anisotropy that can be explained by the combined action of isotropic mechanisms, such as relaxation by the contacts and resonant scattering by magnetic impurities, and an anisotropic Rashba spin-orbit based mechanism. We also assess potential sources of error in all three types of experiment and conclude that the m-plane/out-of-plane Hanle method is most reliable.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PERPENDICULAR ANISOTROPY; ROOM-TEMPERATURE; HETEROSTRUCTURES; SPINTRONICS; LIFETIMES; METAL; SEMICONDUCTOR; OXIDATION; DYNAMICS; INPLANE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 09 Mar 2020 13:14 |
| Last Modified: | 09 Mar 2020 13:14 |
| URI: | https://pred.uni-regensburg.de/id/eprint/14564 |
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