Spin edge helices in a perpendicular magnetic field

Details Spin edge helices in a perpendicular magnetic field Spin edge helices in a perpendicular magnetic field

2010-08-04

arxiv.org/abs/1008.0703v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

In press in Physical Review Letters; Revised arguments in the introductory part; 3 figures

Scientific paper

We present an exact solution to the problem of the spin edge states in the presence of equal Bychkov-Rashba and Dresselhaus spin-orbit fields in a two-dimensional electron system, restricted by a hard-wall confining potential and exposed to a perpendicular magnetic field. We find that the spectrum of the spin edge states depends critically on the orientation of the sample edges with respect to the crystallographic axes. Such a strikingly different spectral behavior generates new modes of the persistent spin helix-spin edge helices with novel properties, which can be tuned by the applied electric and magnetic fields.

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