Spontaneous spin-polarized current in a nonuniform Rashba interaction system

Details Spontaneous spin-polarized current in a nonuniform Rashba interaction system Spontaneous spin-polarized current in a nonuniform Rashba interaction system

2004-11-24

arxiv.org/abs/cond-mat/0411596v1

Phys. Rev. B 71, 155321 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.71.155321

We investigate the electron transport through a two-dimensional semiconductor with a nonuniform Rashba spin-orbit interaction. Due to the combination of the coherence effect and the Rashba interaction, a spontaneous spin-polarized current emerges in the absence of any magnetic material and magnetic field. For a two-terminal device, only the local current contains polarization; however, with a four-terminal setup, a polarized total current is produced. This phenomenon may offer a novel way for generating a spin-polarized current, replacing the traditional spin-injection method.

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