Scheid, Matthias and Wimmer, Michael and Bercioux, Dario and Richter, Klaus
Zeeman ratchets for ballistic spin currents.
physica status solidi (c) 3 (12), pp. 4235-4238.
Other URL: http://www3.interscience.wiley.com/cgi-bin/abstract/114075525/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, spin-up and -down electrons experience different effective potentials, which can be ...
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