Edge-induced spin polarization in two-dimensional electron gas

Details Edge-induced spin polarization in two-dimensional electron gas Edge-induced spin polarization in two-dimensional electron gas

2010-01-05

arxiv.org/abs/1001.0720v1

Phys. Rev. B 81, 125302 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 5 figures

Scientific paper

10.1103/PhysRevB.81.125302

We characterize the role of the spin-orbit coupling between electrons and the confining potential of the edge in nonequilibrium 2D homogeneous electronic gas. We derive a simple analytical result for the magnitude of the current induced spin polarization at the edge and prove that it is independent of the details of the confinement edge potential and the electronic density within realistic values of the parameters of the considered models. While the amplitude of the spin accumulation is comparable to the experimental values of extrinsic spin Hall effect in similar samples, the spatial extent of edge induced effect is restricted to the distances of the order of Fermi wavelength ($\sim$ 10nm).

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