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Charged Magnetoexcitons in Two Dimensions: Isolated X — and Many‐Electron Effects
Author(s) -
Dzyubenko A.B.,
Nickel H.A.,
Yeo T.,
McCombe B.D.,
Petrou A.
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<365::aid-pssb365>3.0.co;2-g
Subject(s) - exciton , electron , physics , valence band , condensed matter physics , valence (chemistry) , atomic physics , electron hole , screening effect , quantum mechanics
The states of charged magnetoexcitons in two‐dimensional systems are considered. Exact optical selection rules for intra‐ and inter‐band processes are discussed. The effect of excess electrons on internal transitions of negatively charged excitons X — in quantum wells is studied experimentally and theoretically. An experimentally observed blue‐shift with excess electron density is explained in terms of collective excitations, magnetoplasmons bound to a valence band hole.