Abstract
Conduction and valence band edges in semimagnetic semiconductors (e.g., Zn1-xMnxSe) 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 Zeeman shifts provide the ability of tuning band alignments at the interfaces of the constituent materials. As illustrative examples of such Zeeman tuning, we discuss spin superlattices, magnetic-field-induced type I→type II conversion, mapping of probability distributions in semiconductors, and opportunities for spin lifetime determination.
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