Spin blockade at semiconductor/ferromagnet junctions
介观与纳米尺度物理
2007-06-13 v2
摘要
We study theoretically extraction of spin-polarized electrons at nonmagnetic semiconductor/ferromagnet junctions. The outflow of majority spin electrons from the semiconductor into the ferromagnet leaves a cloud of minority spin electrons in the semiconductor region near the junction, forming a local spin-dipole configuration at the semiconductor/ferromagnet interface. This minority spin cloud can limit the majority spin current through the junction creating a pronounced spin-blockade at a critical current. We calculate the critical spin-blockade current in both planar and cylindrical geometries and discuss possible experimental tests of our predictions.
引用
@article{arxiv.cond-mat/0701678,
title = {Spin blockade at semiconductor/ferromagnet junctions},
author = {Yu. V. Pershin and M. Di Ventra},
journal= {arXiv preprint arXiv:cond-mat/0701678},
year = {2007}
}
备注
to be published in PRB