Adiabatic quantum pumping of a desired ratio of spin current to charge current

Details Adiabatic quantum pumping of a desired ratio of spin current to charge current Adiabatic quantum pumping of a desired ratio of spin current to charge current

2005-07-12

arxiv.org/abs/cond-mat/0507271v2

Phys. Rev. B 73, 075308 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 7 figures, to be published in PRB

Scientific paper

10.1103/PhysRevB.73.075308

We present a prescription for generating pure spin current or spin selective current, based on adiabatic quantum pumping in a tight-binding model of a one dimensional conductor. A formula for the instantaneous pumped current is derived without introducing the scattering matrix. Our calculations indicate that some pumping cycles produce the maximum value 2 of pumped spin while others reverse the direction of current as a result of small alterations of the pumping cycle. We find pumping cycles which produce essentially any ratio of spin current to charge current.

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