Scheid, Matthias and Pfund, A. and Bercioux, D. and Richter, Klaus
Coherent spin ratchets: A spin-orbit based quantum ratchet mechanism for spin-polarized currents in ballistic conductors.
Physical Review B (PRB) 76, pp. 195303-1.
Other URL: http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRBMDO000076000019195303000001&idtype=cvips&gifs=yes
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 static bias, the system generates a directed spin current while the total charge current is zero. We analyze the ...
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