Spin-dependent transport in a quasiballistic quantum wire
Journal
Physical Review B - Condensed Matter and Materials Physics
Journal Volume
61
Journal Issue
15
Pages
9952-9955
Date Issued
2000
Author(s)
Abstract
We describe the transport properties of a (Formula presented)-long one-dimensional (1D) quantum wire. Reduction of conductance plateaus due to the introduction of weak disorder scattering is observed. In an in-plane magnetic field, we observe a spin splitting of the reduced conductance steps. Our experimental results provide evidence that the deviation from conductance quantization is very small for electrons with spin parallel and is about (Formula presented) for electrons with spin antiparallel. Moreover, in a high in-plane magnetic field, a spin-polarized 1D channel shows a plateaulike structure close to (Formula presented) which strengthens with increasing temperature. It is suggested that these results arise from a combination of disorder and electron-electron interactions in a 1D electron gas. © 2000 The American Physical Society.
Type
journal article