Eur. Phys. J. B 56, 83-91 (2007)
https://doi.org/10.1140/epjb/e2007-00094-6

Josephson current through a ferromagnetic semiconductor/semiconductor/ferromagnetic semiconductor structure

Department of Physics, Nanjing Normal University, Nanjing, 210097, P.R. China

Corresponding author: ^a taoyongchun@njnu.edu.cn

Received: 10 October 2006
Revised: 26 January 2007
Published online: 12 April 2007

Abstract

We theoretically calculate the Josephson current for two superconductor/ferromagnetic semiconductor (SC/FS) bilayers separated by a semiconductor (SM) layer. It is found that the critical Josephson current I_C in the junction is strongly determined by not only the relative orientations of the effective exchange field of the two bilayers and scattering potential strengths at the interfaces but also the kinds of holes (the heavy or light) in the two FS layers. Furthermore, a robust approach to measuring the spin polarization P for the heavy and light holes is presented.