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Magneto‐optical spectroscopy of gated p‐doped CdMnTe quantum wells
Author(s) -
Boukari H.,
Bertolini M.,
Ferrand D.,
Cibert J.,
Tatarenko S.,
Kossacki P.,
Gaj J. A.
Publication year - 2004
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/pssb.200304222
Subject(s) - trion , zeeman effect , photoluminescence , condensed matter physics , spectroscopy , exciton , chemistry , energy level splitting , population , quantum well , doping , physics , magnetic field , atomic physics , optoelectronics , optics , laser , demography , quantum mechanics , sociology
We describe the magneto‐photoluminescence of (Cd,Mn)Te/(Cd,Zn,Mg)Te quantum wells containing a 2D hole gas . The hole population can be tuned either optically in p‐i‐p structures, by above barrier illumination, or electrically by applying a bias voltage of a few volts on a p‐i‐n structure. We identify the photoluminescence at low field as due to the positively charged exciton X + , which is destabilized at a given value of the Zeeman splitting, due to its crossing with a state involving a triplet configuration of the trion hole pair. The X + looses its intensity in favor of a double line which exhibits features associated to band‐to‐band transitions at k = 0 and k = k F (wave vector at Fermi energy). (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)