Magnetically-controlled impurities in quantum wires with strong Rashba coupling

Details Magnetically-controlled impurities in quantum wires with strong Rashba coupling Magnetically-controlled impurities in quantum wires with strong Rashba coupling

2004-08-30

arxiv.org/abs/cond-mat/0408656v2

Phys. Rev. B 71, 085318 (2005)

Physics

Condensed Matter

Materials Science

4 pages, 2 figures

Scientific paper

10.1103/PhysRevB.71.085318

We investigate the effect of strong spin-orbit interaction on the electronic transport through non-magnetic impurities in one-dimensional systems. When a perpendicular magnetic field is applied, the electron spin polarization becomes momentum-dependent and spin-flip scattering appears, to first order in the applied field, in addition to the usual potential scattering. We analyze a situation in which, by tuning the Fermi level and the Rashba coupling, the magnetic field can suppress the potential scattering. This mechanism should give rise to a significant negative magnetoresistance in the limit of large barriers.

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