Scheid, Matthias and Lassl, Andreas and Richter, Klaus (2009) Resonant-tunneling-based spin ratchets. EPL, 87 (1): 17001. ISSN 0295-5075,
Full text not available from this repository. (Request a copy)Abstract
We outline a generic ratchet mechanism for creating directed spin-polarized currents in ac-driven double-well or double-dot structures by employing resonant spin transfer through the system engineered by local external magnetic fields. We show its applicability to semiconductor nanostructures by considering coherent transport through two coupled lateral quantum dots, where the energy levels of the two dots exhibit opposite Zeeman spin splitting. We perform numerical quantum-mechanical calculations for the I-V characteristics of this system in the nonlinear regime, which requires a self-consistent treatment of the charge redistribution due to the applied finite bias. We show that this setting enables nonzero averaged net spin currents in the absence of net charge transport. Copyright (C) EPLA, 2009
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ZEEMAN RATCHETS; BROWNIAN MOTORS; QUANTUM-DOT; TRANSPORT; DEVICES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Sep 2020 04:38 |
| Last Modified: | 14 Sep 2020 04:38 |
| URI: | https://pred.uni-regensburg.de/id/eprint/28737 |
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