Publication: Optical absorption in paired correlated random lattices
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ISSN: 1098-0121 (print version)
ISSN: 1550-235X (online version)
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1994-09-01
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American Physical Society
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Abstract
Optical absorption in a random one-dimensional lattice in the presence of paired correlated disorder
is studied. The absorption line shape is evaluated by solving the microscopic equations of motion
of the F'renkel-exciton problem in the lattice. We find that paired correlation causes the occurrence
of well-defined characteristic lines in the absorption spectra which clearly differ from the case of
unpaired correlation. The behavior of the absorption lines as a function of defect concentration is
studied in detail. We also show how exciton dynamics can be inferred from experimental data by
deriving an analytical expression relating the energy and intensity of lines to the model parameters.
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Physical Review B, vol. 50, n. 9, 1 sep. 1994. Pp. 6453–6456