Spin-orbit coupling effects in one-dimensional ballistic quantum wires

Details Spin-orbit coupling effects in one-dimensional ballistic quantum wires Spin-orbit coupling effects in one-dimensional ballistic quantum wires

2007-09-07

arxiv.org/abs/0709.1057v2

J. Phys.: Condensed Matter 20, 085226 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 6 figures, revised version

Scientific paper

10.1088/0953-8984/20/8/085226

We study the spin-dependent electronic transport through a one-dimensional ballistic quantum wire in the presence of Rashba spin-orbit interaction. In particular, we consider the effect of the spin-orbit interaction resulting from the lateral confinement of the two-dimensional electron gas to the one-dimensional wire geometry. We generalize a situation suggested earlier [P. Streda and P. Seba, Phys. Rev. Lett. 90, 256601 (2003)] which allows for spin-polarized electron transport. As a result of the lateral confinement, the spin is rotated out of the plane of the two-dimensional system. We furthermore investigate the spin-dependent transmission and the polarization of an electron current at a potential barrier. Finally, we construct a lattice model which shows similar low-energy physics. In the future, this lattice model will allow us to study how the electron-electron interaction affects the transport properties of the present setup.

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