title: Spin edge helices in a perpendicular magnetic field.
abstract: 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.
authors.affiliation: Department of Physics, University of Regensburg, 93040 Regensburg, Germany. Samvel.Badalyan@physik.uni-regensburg.de
authors.forename: S M
authors.initials: SM
authors.lastname: Badalyan
authors.forename: J
authors.initials: J
authors.lastname: Fabian