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On the Theory of Excitons in High Magnetic Fields
Author(s) -
Fritsche L.
Publication year - 1969
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.19690340118
Subject(s) - exciton , magnetic field , condensed matter physics , absorption (acoustics) , physics , absorption spectroscopy , range (aeronautics) , binding energy , quantum mechanics , atomic physics , materials science , optics , composite material
A theory of excitonic optical absorption at high magnetic fields previously published by Elliott and Loudon is studied in detail in view of recent experiments on GaSe. According to an estimate of Elliott and Loudon their theory should become applicable at fields far above 500 kG for an excition binding energy of 20 me V in GaSe. In contrast, it is shown in the present paper that the theory does very well fit the observed field dependence of the excitonic states already in range of 40 to 100 kG, except for the first two states. Moreover, it provides a simple explanation of weaker satellite lines in the absorption spectrum observed above ca. 40 kG.