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Título:
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Anomalous optical absorption in a random system with scale-free disorder
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Autores:
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Díaz García, Elena ;
Rodriguez, A. ;
Domínguez-Adame Acosta, Francisco ;
Malyshev, Andrey
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Tipo de documento:
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texto impreso
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Editorial:
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EDP Sciences, 2005-12
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/restrictedAccess
info:eu-repo/semantics/openAccess
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Idiomas:
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,
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física de materiales
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Tipo = Artículo
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Resumen:
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Optical spectroscopy usually fails in detecting localization-delocalization (Anderson) transitions. We report on an anomalous behavior of the absorption spectrum in a one-dimensional lattice with long-range correlated diagonal disorder, having a power-like spectrum S(k)similar to 1/k(alpha). This type of correlations gives rise to a phase of extended states at the band center, provided alpha is larger than a critical value alpha(c). We show that for alphaalpha(c), signaling the occurrence of the Anderson transition. The peak is located slightly below the low-energy mobility edge, providing a unique spectroscopic tool to monitor the latter. We present qualitative arguments explaining this anomaly.
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En línea:
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https://eprints.ucm.es/id/eprint/27405/1/Dguez-Adame48.pdf
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