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Trions in ZnSe‐Based Quantum Wells Probed by 50 T Magnetic Fields
Author(s) -
Yakovlev D.R.,
Astakhov G.V.,
Ossau W.,
Crooker S.A.,
Miura N.,
Waag A.,
Gippius N.A.,
Sivachenko A.Yu.,
Dzyubenko A.B.
Publication year - 2001
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(200110)227:2<353::aid-pssb353>3.0.co;2-s
Subject(s) - singlet state , magnetic field , triplet state , exciton , condensed matter physics , binding energy , saturation (graph theory) , atomic physics , photoluminescence , quantum well , physics , chemistry , excited state , quantum mechanics , optics , laser , mathematics , combinatorics
Singlet and triplet states of negatively charged excitons (trions) in ZnSe/(Zn,Be,Mg)Se quantum wells have been studied by means of photoluminescence in pulsed magnetic fields up to 50 T. Singlet state binding energies, measured for different well widths ranging from 48 to 190 Å, show a monotonic increase with growing magnetic fields with a tendency to saturation. This behavior is in qualitative agreement with results of model calculations. Quantitatively, the binding energy of singlet states is underestimated by about 50%. The triplet state assigned to the “dark” triplet becomes detectable in magnetic fields above 15 T. A crossover of the triplet and singlet states is expected in magnetic fields of about 50 T.