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
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 IC 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.
PACS: 74.50.+r – Tunneling phenomena; point contacts, weak links, Josephson effects / 74.45.+c – Proximity effects; Andreev effect; SN and SNS junctions / 75.50.Pp – Magnetic semiconductors
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007
