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Combined Exciton–Electron and Trion–Electron Excitations in ZnSe/ZnMgSSe Modulation‐Doped Quantum Wells
Author(s) -
Kochereshko V.P.,
Astakhov G.V.,
Yakovlev D.R.,
Ossau W.,
Faschinger W.,
Landwehr G.
Publication year - 2002
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 - 10.1002/1521-3951(200201)229:1<543::aid-pssb543>3.0.co;2-o
Subject(s) - trion , exciton , photoluminescence , electron , quantum well , doping , condensed matter physics , excitation , atomic physics , atomic electron transition , landau quantization , spectral line , physics , materials science , chemistry , optoelectronics , optics , laser , quantum mechanics , astronomy
In modulation‐doped ZnSe/(Zn,Mg)(S,Se) quantum well structures with electron concentration of about 10 11 cm —2 a new resonant optical transition involving four particles (one hole and three electrons) was found in external magnetic fields in photoluminescence excitation and reflectivity spectra. This transition reveals as a narrow line between exciton and trion lines. It is identified with a combined process in which a photocreated exciton binds with an electron forming a trion and promotes for the second electron a transition to higher Landau levels.