Shiogai, Junichi and Ciorga, Mariusz and Utz, Martin and Schuh, Dieter and Kohda, Makoto and Bougeard, Dominique and Nojima, Tsutomu and Nitta, Junsaku and Weiss, Dieter (2014) Giant enhancement of spin detection sensitivity in (Ga,Mn)As/GaAs Esaki diodes. PHYSICAL REVIEW B, 89 (8): 081307. ISSN 1098-0121, 1550-235X
Full text not available from this repository. (Request a copy)Abstract
We investigate the correlation between spin signals measured in three-terminal (3T) geometry by the Hanle effect and the spin accumulation generated in a semiconductor channel in a lateral (Ga,Mn)As/GaAs Esaki diode device. We systematically compare measurements using a 3T configuration, probing spin accumulation directly beneath the injecting contact, with results from nonlocal measurements, where solely spin accumulation in the GaAs channel is probed. We find that the spin signal detected in the 3T configuration is dominated by a bias-dependent spin detection sensitivity, which in turn is strongly correlated with charge-transport properties of the junction. This results in a particularly strong enhancement of the detected spin signal in a region of increased differential resistance. We find additionally that two-step tunneling via localized states in the gap of (Ga,Mn)As does not compromise spin injection into the semiconductor conduction band.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SCANNING-TUNNELING-MICROSCOPY; ROOM-TEMPERATURE; SPINTRONICS; TRANSPORT; SILICON; |
| 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: | 27 Nov 2019 09:54 |
| Last Modified: | 27 Nov 2019 09:54 |
| URI: | https://pred.uni-regensburg.de/id/eprint/10651 |
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