title: Spin-polarized transport in inhomogeneous magnetic semiconductors: theory of magnetic/nonmagnetic p-n junctions.
abstract: A theory of spin-polarized transport in inhomogeneous magnetic semiconductors is developed and applied to magnetic/nonmagnetic p-n junctions. Several phenomena with possible spintronic applications are predicted, including spin-voltaic effect, spin valve effect, exponential and giant magnetoresistance. It is demonstrated that only nonequilibrium spin can be injected across the space-charge region of a p-n junction, so that there is no spin injection (or extraction) at low bias.
authors.affiliation: Department of Physics, University of Maryland at College Park, College Park, Maryland 20742-4111, USA.
authors.forename: Igor
authors.initials: I
authors.lastname: Zutić
authors.forename: Jaroslav
authors.initials: J
authors.lastname: Fabian
authors.forename: S
authors.initials: S
authors.lastname: Das Sarma