G. Salis, S.F. Alvarado, et al.
Physical Review B - CMMP
The spin polarization of electrons injected into GaAs from a CoFeMgO (100) tunnel spin injector is inferred from the circular polarization of light emitted from a GaAs-based quantum well (QW) detector. The circular polarization strongly depends on the spin and electron hole recombination lifetimes in the QW. Using time-resolved optical techniques, we show that these lifetimes are highly temperature dependent. A peak in the charge lifetime versus temperature is likely responsible for the previously observed dip in the electroluminescence polarization. Evidence for a temperature-independent spin injection efficiency of ∼70% from 10 K to room temperature is found. © 2005 American Institute of Physics.
G. Salis, S.F. Alvarado, et al.
Physical Review B - CMMP
M. Studer, S. Schön, et al.
Physical Review B - CMMP
X. Jiang, R. Wang, et al.
Physical Review Letters
W.H. Teh, U. Dürig, et al.
Applied Physics Letters