Kuczmik, T. and Oltscher, M. and Bayer, A. and Schuh, D. and Bougeard, D. and Ciorga, M. and Weiss, D. (2017) Hanle spin precession in a two-dimensional electron system. PHYSICAL REVIEW B, 95 (19): 195315. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
We investigate the nonlocal Hanle effect in high mobility two-dimensional electron systems using (Ga,Mn)As/GaAs spin Esaki diodes as spin selective contacts. Spin signals in these systems can be strongly affected by dynamic nuclear polarization, which mimics long spin-relaxation times extracted from the measured Hanle curves. Here, we introduce a method which largely suppresses these effects by using an ac injection-detection setup. This allows us to extract from the measurements realistic spin lifetimes on the order of single nanoseconds. As the detection of Hanle signals is also strongly affected by offset signals we discuss the magnetic field dependence of these background voltages observed in lateral nonlocal spin injection devices. We show how the strength of the background magnetoresistance can be minimized by choosing a proper device geometry.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | RELAXATION ANISOTROPY; ROOM-TEMPERATURE; INJECTION; POLARIZATION; SPINTRONICS; SILICON; SEMICONDUCTORS; TRANSPORT; CURRENTS; VALVE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Huber > Group Dominique Bougeard |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:10 |
| Last Modified: | 28 Feb 2019 07:38 |
| URI: | https://pred.uni-regensburg.de/id/eprint/866 |
Actions (login required)
 |
View Item |
