Spin Hall Current Driven by Quantum Interferences in Mesoscopic Rashba Rings
Abstract
We propose an all-electrical nanoscopic structure where {\em pure} spin current is induced in the transverse voltage probes attached to {\em quantum-coherent} one-dimensional ring when conventional unpolarized charge current is injected through its longitudinal leads. Tuning of the Rashba spin-orbit coupling in semiconductor heterostructure hosting the ring generates quasi-periodic oscillations of the predicted spin Hall current due to {\em spin-sensitive quantum-interference effects} caused by the difference in Aharonov-Casher phase acquired by opposite spins states traveling clockwise and counterclockwise. Its amplitude is comparable to the mesoscopic spin Hall current predicted for finite-size two-dimensional electron gases, while it gets reduced in wide two-dimensional or disordered rings.
Cite
@article{arxiv.cond-mat/0410716,
title = {Spin Hall Current Driven by Quantum Interferences in Mesoscopic Rashba Rings},
author = {Satofumi Souma and Branislav K. Nikolic},
journal= {arXiv preprint arXiv:cond-mat/0410716},
year = {2007}
}
Comments
5 pages, 4 color figures