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Spin-Hall edge spin polarization in a ballistic 2D electron system | | V. A. Zyuzin
; P. G. Silvestrov
; E. G. Mishchenko
; | | Date: |
16 May 2007 | | Subject: | Mesoscopic Systems and Quantum Hall Effect (cond-mat.mes-hall) | | Abstract: | Spin-Hall effect in ballistic 2D electron systems reveals some universal
properties. In particular, the net spin polarization across the edge of the
conductor is second order, ~lambda^2, in spin-orbit coupling constant
independent of the form of the boundary potential, with the contributions of
normal and evanescent modes each being ~sqrt{lambda} but of opposite signs.
This general result is confirmed by the analytical solution for a hard-wall
boundary, which also yields the detailed distribution of the local spin
polarization. The latter shows fast (Friedel) oscillations with the spin-orbit
coupling entering via the period of slow beatings only. Long-wavelength
contributions of evanescent and normal modes exactly cancel each other in the
spectral distribution of the local spin density. | | Source: | arXiv, arxiv.0705.2424 | | Services: | Forum | Review | PDF | Favorites | |
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