Schlapps, Markus and Lermer, Teresa and Geissler, Stefan and Neumaier, Daniel and Sadowski, Janusz and Schuh, Dieter and Wegscheider, Werner and Weiss, Dieter (2009) Transport through (Ga, Mn) As nanoislands: Coulomb blockade and temperature dependence of the conductance. PHYSICAL REVIEW B, 80 (12): 125330. ISSN 1098-0121,
Full text not available from this repository.Abstract
We report on magnetotransport measurements of nanoconstricted (Ga, Mn) As devices showing very large resistance changes that can be controlled by both an electric and a magnetic field. Based on the bias voltage and temperature-dependent measurements down to the millikelvin range we compare the models currently used to describe transport through (Ga, Mn) As nanoconstrictions. We provide an explanation for the observed spin-valvelike behavior during a magnetic field sweep by means of the magnetization configurations in the device. Furthermore, we prove that Coulomb blockade plays a decisive role for the transport mechanism and show that modeling the constriction as a granular metal describes the temperature and bias dependence of the conductance correctly and allows to estimate the number of participating islands located in the constriction.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SINGLE-ELECTRON TRANSISTOR; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 09 Sep 2020 08:11 |
| Last Modified: | 09 Sep 2020 08:11 |
| URI: | https://pred.uni-regensburg.de/id/eprint/28538 |
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