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Zeeman ratchets for ballistic spin currents

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DOI to cite this document:
Scheid, Matthias ; Wimmer, Michael ; Bercioux, Dario ; Richter, Klaus
[img]PDF - Published Version
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PDF - Accepted Version
arXiv PDF (31.10.2006)
PDF - Submitted Version
arXiv PDF (14.07.2006)
Date of publication of this fulltext: 05 Aug 2009 13:33


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, spin-up and -down electrons experience different effective potentials, which can be ...


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