Spin current and rectification in Luttinger liquids

Details Spin current and rectification in Luttinger liquids Spin current and rectification in Luttinger liquids

2007-06-19

arxiv.org/abs/0706.2761v1

Phys. Rev. B 76, 085119 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages, 5 figures

Scientific paper

10.1103/PhysRevB.76.085119

We demonstrate that spin current can be generated by an ac voltage in a one-channel quantum wire with strong repulsive electron interactions in the presence of a non-magnetic impurity and uniform static magnetic field. In a certain range of voltages, the spin current can exhibit a power dependence on the ac voltage bias with a negative exponent. The spin current expressed in units of $\hbar/2$ per second can become much larger than the charge current in units of the electron charge per second. The spin current generation requires neither spin-polarized particle injection nor time-dependent magnetic fields.

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