%0 Journal Article %J JOURNAL OF SUPERCONDUCTIVITY %D 2003 %T Spin injection: Interface resistance in Fe/semiconductor junctions calculated from first principles %A Wunnicke, O %A P. Mavropoulos %A P.H. Dederichs %X We calculate the current spin polarization and the interface resistance of Fe/GaAs and Fe/ZnSe (001) spin injection junctions from first principles, including also the possibility of a Schottky barrier. From our results of interface resistance we estimate the barrier thickness needed for efficient spin injection if the process is nonballistic. %B JOURNAL OF SUPERCONDUCTIVITY %V 16 %P 171-173 %8 FEB %G eng %R 10.1023/A:1023234128898