Publication: Motional narrowing effect in certain random binary lattices
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2000-08-14
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Elsevier
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Abstract
We present a model for a class of random binary lattices by introducing a one-dimensional system where impurities are placed in one sublattice while host atoms lie on the other sublattice. The source of disorder is the stochastic fluctuation of the impurity energy from site to site. We study the optical absorption spectra and the peculiarities of the motional narrowing effect at the band edges for perturbative and nonperturbative degrees of disorder. Analytical results agree well with numerical simulations.
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© 2000 Elsevier Science B.V. All rights reserved.
The author thanks V. Malyshev and A. Rodr´ıguez for helpful discussions. This work is supported by Comunidad de Madrid under Project 07N/0034/98.
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