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Effect of Magnetic Impurity Concentration and Spin Projection Fluctuations on Exciton Spectra in Diluted Magnetic Semiconductor Quantum Wells
Author(s) -
Sugakov V. I.,
Vertsimakha A. V.
Publication year - 1998
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(199809)209:1<49::aid-pssb49>3.0.co;2-9
Subject(s) - condensed matter physics , exciton , quantum well , magnetic field , impurity , magnetic semiconductor , relaxation (psychology) , spin (aerodynamics) , biexciton , spectral line , chemistry , materials science , physics , doping , optics , laser , quantum mechanics , thermodynamics , psychology , social psychology , organic chemistry , astronomy
The broadening of the exciton line caused by elastic scattering of the exciton on fluctuations of magnetic impurity concentration and spin projection in CdMnTe/CdTe/CdMnTe quantum wells is calculated. The relaxation time as a function of well width is found. The possibility of suppression of the impurity concentration fluctuation potential by a magnetic field in diluted magnetic semiconductors and of a corresponding narrowing of the exciton reflection lines in quantum wells is predicted. It is shown that the line broadening of the σ — component of the exciton transition increases as the magnetic field rises, and the broadening of the σ + component decreases. The effect of impurity concentration fluctuations on light reflection by a quantum well is analyzed.