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Original Paper
Zeeman ratchets for ballistic spin currents
Article first published online: 18 JAN 2007
DOI: 10.1002/pssc.200672835
Copyright © 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Scheid, M., Wimmer, M., Bercioux, D. and Richter, K. (2006), Zeeman ratchets for ballistic spin currents. Phys. Status Solidi C, 3: 4235–4238. doi: 10.1002/pssc.200672835
Publication History
- Issue published online: 18 JAN 2007
- Article first published online: 18 JAN 2007
- Manuscript Accepted: 26 OCT 2006
- Manuscript Revised: 25 AUG 2006
- Manuscript Received: 14 JUL 2006
Funded by
- Deutsche Forschungsgemeinschaft within the cooperative research center SFB 689 “Spin phenomena in low dimensions”
- Abstract
- References
- Cited By
Keywords:
- 71.70.Ej;
- 72.25.Dc;
- 73.40.Ei
Abstract
We investigate the possiblity of creating directed spin-polarized currents in a two-dimensional electron gas (2DEG) subject to an asymmetric magnetic field and an external adiabatic driving. We thereby generalize concepts of quantum charge ratchets to the case with spin. Due to the Zeeman term in the Hamiltonian, spinup and -down electrons experience different effective potentials, which can be tailored to achieve net spin currents without corresponding charge currents. We consider ballistic, coherent transport in waveguides defined in a 2DEG, where the magnetic field modulation is induced by ferromagnetic stripes on top of the 2DEG. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)