Phase Diagram of Diluted Magnetic Semiconductor Quantum Wells

L. Brey and F. Guinea Instituto de Ciencia de Materiales (CSIC), Cantoblanco, 28049 Madrid, Spain

Physical Review Letters -- September 11, 2000 -- Volume 85, Issue 11 pp. 2384-2387

The phase diagram of diluted magnetic semiconductor quantum wells is investigated. The interaction between the carriers in the hole gas can lead to first-order ferromagnetic transitions, which remain abrupt in applied fields. These transitions can be induced by magnetic fields or, in double-layer systems, by electric fields. We make a number of precise experimental predictions for observing these first-order phase transitions.

KeyWords : semiconductor quantum wells; magnetic semiconductors; phase diagrams; phase transformations; electric field effects; gallium arsenide; manganese compounds

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