Spin Injection in a Ballistic Two-Dimensional Electron Gas
Mesoscale and Nanoscale Physics
2009-10-31 v1
Abstract
We explore electrically injected, spin polarized transport in a ballistic two-dimensional electron gas. We augment the Buettiker-Landauer picture with a simple, but realistic model for spin-selective contacts to describe multimode reservoir-to-reservoir transport of ballistic spin 1/2 particles. Clear and unambiguous signatures of spin transport are established in this regime, for the simplest measurement configuration that demonstrates them directly. These new effects originate from spin precession of ballistic carriers; they exhibit strong dependence upon device geometry and vanish in the diffusive limit. Our results have important implications for prospective ``spin transistor'' devices.
Cite
@article{arxiv.cond-mat/9907451,
title = {Spin Injection in a Ballistic Two-Dimensional Electron Gas},
author = {H. X. Tang and F. G. Monzon and Ron Lifshitz and M. C. Cross and M. L. Roukes},
journal= {arXiv preprint arXiv:cond-mat/9907451},
year = {2009}
}
Comments
Submitted to Phys. Rev. Lett