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Temperature Dependence of the 1S Line of the Yellow Series of Cu 2 O
Author(s) -
Merle J. C.,
Nikitine S.,
Haken H.
Publication year - 1974
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.2220610119
Subject(s) - anisotropy , phonon , condensed matter physics , line (geometry) , dispersion (optics) , voigt profile , materials science , physics , optics , spectral line , mathematics , quantum mechanics , geometry
The behaviour of the shape of the quadrupolar n = 1 line of the yellow serie of Cu 2 O is described as a function of temperature. The total anisotropy ofthis line enables one to use a highly sensitive polarization modulation technique, with ahigh dispersion set‐up. The behaviour of the line being inexplainable in the scopeof previous theories, is discussed with a new theoretical model in which both the defectsof the crystal and the phonons are taken into account, and which leads to an absorption having a Voigt shape. The analysis of the experimental results enables one to evaluate theparticipation of the defects and shows that both acoustic and optical phonons scatter theconsidered exciton, in good agreement with the theory.