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Coherent spin ratchets: A spin-orbit based quantum ratchet mechanism for spin-polarized currents in ballistic conductors

URN to cite this document:
urn:nbn:de:bvb:355-epub-25393
Scheid, Matthias ; Pfund, Andreas ; Bercioux, Dario ; Richter, Klaus
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Date of publication of this fulltext: 05 Aug 2009 13:40



Abstract

We demonstrate that the combined effect of a spatially periodic potential, lateral confinement, and spin-orbit interaction gives rise to a quantum ratchet mechanism for spin-polarized currents in two-dimensional coherent conductors. Upon adiabatic ac driving, in the absence of a net static bias, the system generates a directed spin current while the total charge current is zero. We analyze the ...

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