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.

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

References in corpus (9)

• An Exact SU(2) Symmetry and Persistent Spin Helix in a Spin-Orbit Coupled System
• Emergence of the persistent spin helix in semiconductor quantum wells
• Ballistic Spin Resonance
• Persistent spin helix in Rashba-Dresselhaus two-dimensional electron systems
• Beating of Friedel oscillations induced by spin-orbit interaction
• Non-Abelian spin-orbit gauge: Persistent spin helix and quantum square ring
• Spin Coulomb drag beyond the random phase approximation
• Spin Hall Drag
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Cited by in corpus (7)

• Persistent Spin Textures in Semiconductor Nanostructures
• Magnetic properties of HgTe quantum wells
• The split-operator technique for the study of spinorial wavepacket dynamics
• Probing topological transitions in HgTe/CdTe quantum wells by magneto-optical measurements
• Spin-orbit interaction induced singularity of the charge density relaxation propagator
• Helical liquid of snake states
• Effect of boundary scattering on spin-hall effect