Rashba effect and magnetic field in quantum wires
Stefan Debald, Bernhard Kramer
TL;DR
This paper studies how a perpendicular magnetic field affects the spectral and spin properties of a quantum wire with Rashba effect, revealing a new large subband-dependent energy splitting caused by symmetry breaking.
Contribution
It introduces the impact of magnetic fields on Rashba-influenced quantum wires, highlighting a novel large energy splitting due to symmetry breaking.
Findings
Magnetic field significantly alters subband structure when magnetic length matches lateral confinement.
A new large subband-dependent energy splitting at k=0 is identified.
The splitting exceeds Zeeman splitting due to symmetry breaking.
Abstract
We investigate the influence of a perpendicular magnetic field on the spectral and spin properties of a ballistic quasi-one-dimensional electron system with Rashba effect. The magnetic field strongly alters the spin-orbit induced modification to the subband structure when the magnetic length becomes comparable to the lateral confinement. A new subband-dependent energy splitting at k=0 is found which can be much larger than the Zeeman splitting. This is due to the breaking of a combined spin orbital-parity symmetry.
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