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arXiv · 1009.1102

Excitons in Molecular Aggregates with Lévy Disorder: Anomalous Localization and Exchange Broadening of Optical Spectra

A. Eisfeld·S. M. Vlaming·V. A. Malyshev·J. Knoester
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Abstract

We predict the existence of exchange broadening of optical lineshapes in disordered molecular aggregates and a nonuniversal disorder scaling of the localization characteristics of the collective electronic excitations (excitons). These phenomena occur for heavy-tailed Lévy disorder distributions with divergent second moments - distributions that play a role in many branches of physics. Our results sharply contrast with aggregate models commonly analyzed, where the second moment is finite. They bear a relevance for other types of collective excitations as well.

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A. Eisfeld, S. M. Vlaming, V. A. Malyshev, J. Knoester. 2010-09-06. Excitons in Molecular Aggregates with Lévy Disorder: Anomalous Localization and Exchange Broadening of Optical Spectra. https://doi.org/10.1103/physrevlett.105.137402

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