Edge Spin Current and Spin Polarization in Quantum Hall Regime

Details Edge Spin Current and Spin Polarization in Quantum Hall Regime Edge Spin Current and Spin Polarization in Quantum Hall Regime

2005-03-24

arxiv.org/abs/cond-mat/0503592v2

Phys. Rev. B 72, 245323 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.72.245323

We study the edge spin current and spin polarization in a two-dimensional electron gas with spin-orbit coupling in the presence of a perpendicular magnetic field. The edge effect removes the degeneracy of Landau levels due to the competition between the Rashba coupling and the Zeeman splitting, which exists in the bulk. Large spin edge current and non-linear response to an electric field are found when the two levels are degenerated in the bulk. It is found that he spin current is proportional to spin polarization along the y-direction in an finite magnetic field, which provides a way to extract the spin current in the system.

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