Scheid, Matthias and Bercioux, Dario and Richter, Klaus (2007) Zeeman ratchets: Pure spin current generation in mesoscopic conductors with non-uniform magnetic fields. NEW JOURNAL OF PHYSICS, 9: 401. ISSN 1367-2630,
Full text not available from this repository. (Request a copy)Abstract
We consider the possibility to employ a quantum wire realized in a two-dimensional electron gas (2DEG) as a spin ratchet. We show that a net spin current without accompanying net charge transport can be induced in the nonlinear regime by an unbiased external driving via an ac voltage applied between the contacts at the ends of the quantum wire. To achieve this, we make use of the coupling of the electron spin to inhomogeneous magnetic fields created by ferromagnetic stripes patterned on the semiconductor heterostructure that harbors the 2DEG. Using recursive Green function techniques, we numerically study two different set-ups, consisting of one and two ferromagnetic stripes, respectively.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 2-DIMENSIONAL ELECTRON GASES; QUANTUM RATCHETS; TRANSPORT; INJECTION; BARRIERS; SEMICONDUCTORS; SCATTERING; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 30 Nov 2020 07:29 |
| Last Modified: | 30 Nov 2020 07:29 |
| URI: | https://pred.uni-regensburg.de/id/eprint/31932 |
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