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VOLUME 83 (2006) | ISSUE 8 | PAGE 376
Curved One-Dimensional Wire with Rashba Coupling as a Spin Switch
PACS: 72.25.Dc, 73.23.Ad, 73.63.Nm
Abstract
We propose a semiconductor structure that can switch the electron spin using the interplay between the Rashba effect and geometry of the system. In detail, the structure consists of a strongly curved one-dimensional ballistic wire with intrinsic spin-orbit interactions. Here, in contrast to the previous proposals based on the straight quantum channels, the spin-switching is achievable even if the electrons are in the eigen state and spin-precession does not occur. Using parameters relevant for InAs we investigate the tunability of this effect by means of external electric and magnetic fields.