Zeeman-tuning of heterostructures consisting of semimagnetic and non-magnetic semiconductors

Conduction and valence band edges in semimagnetic semiconductors (e.g., Zn_1-xMn_xSe) undergo enormous Zeeman shifts when a magnetic field is applied, reaching values in excess of 100 meV at low temperatures. We discuss the consequences of this effect for heterostructures consisting of magnetic and nonmagnetic semiconductors, where such Zeemanshifts provide the ability of tuning band alignments at the inteffaces of the constituent materials. As illustrative examplesof such Zeeman tuning, we discuss spin super lattices, magnetic-field-induced type I→Hype II conversion, mapping ofprobability distributions in semiconductors, and opportunities for spin lifetime determination.