Spin blockade at semiconductor/ferromagnet junctions

Abstract

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.

to be published in PRB

References in corpus (2)

• Long-Lived Spin Coherence States
• Electronic structure of nuclear-spin-polarization-induced quantum dots

Cited by in corpus (2)

• Current-voltage characteristics of semiconductor/ferromagnet junctions in the spin blockade regime
• Hall Voltage with the Spin Hall Effect