Sample characteristics. (a) Schematic representation of the Fe/(Cd,Mg)Te/CdTe QW hybrid structure with gradient barrier thickness d showing also the geometry of the experiment on the optical orientation of electrons in the QW. (b) Typical photoluminescence spectrum of the structure. X corresponds to the exciton transition, and e-A0 corresponds to the recombination of electrons with holes bound to acceptors.
In the paper, co-authored by Tomasz Wojtowicz, group leader at MagTop, the authors study the coexistence of short- and long-range ferromagnetic proximity effects in a Fe/(Cd,Mg)Te/CdTe quantum well hybrid structure.