SPONTANEOUS SYMMETRY-BREAKING OF EXCITON MAGNETIC POLARONS IN CDTE CD1-XMNXTE QUANTUM-WELLS/

Theoretical calculations of exciton magnetic-polaron (EMP) energies in semimagnetic CdTe/Cd1-xMnxTe symmetric quantum wells have been perfor med. The influence of a spontaneous symmetry breaking of the carrier's wave function (the so-called interface-bound magnetic polaron on EMP energies is investigated for various magnetic (Mn) ion concentrations and valence-band offsets. It is demonstrated that the stability of int erface-bound magnetic polarons in perfect quantum wells depends on the valence-band offset K, and that, for the accepted value of K in the C dTe/Cd1-xMnxTe system, interface-hound magnetic polarons can form only in samples with low-x values. It is also shown that interface-bound m agnetic polarons are destabilized by the presence of interface disorde r, or as a result of applying a magnetic field or increasing the latti ce temperature.