Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2003-06-06
Phys. Rev. B, vol.68, pag.165312 (2003)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
13 pages,2 figures
Scientific paper
10.1103/PhysRevB.68.165312
We study charge and spin pumping in an interacting one-dimensional wire. We show that a spatially periodic potential modulated in space and time acts as a quantum pump inducing a dc-current component at zero bias. The current generated by the pump is strongly affected by the interactions. It has a power law dependence on the frequency or temperature with the exponent determined by the interaction in the wire, while the coupling to the pump affects the amplitudes only. We also show that pure spin-pumping can be achieved, without the presence of a magnetic field.
Andrei Natan
Citro Roberta
Niu Qian
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