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Título:
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Colossal effects in transition metal oxides caused by intrinsic inhomogeneities
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Autores:
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Burgy, J. ;
Mayr, M. ;
Martín Mayor, Víctor ;
Moreno, A. ;
Dagotto, E.
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Tipo de documento:
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texto impreso
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Editorial:
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American Physical Society, 2001-12-31
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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/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física-Modelos matemáticos
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Tipo = Artículo
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Resumen:
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The influence of quenched disorder on the competition between ordered states separated by a firstorder transition is investigated. A phase diagram with features resembling quantum-critical behavior is observed, even using classical models. The low-temperature paramagnetic regime consists of coexisting ordered clusters, with randomly oriented order parameters. Extended to manganites, this state is argued to have a colossal magnetoresistance effect. A scale T* for cluster formation is discussed. This is the analog of the Griffiths temperature, but for the case of two competing orders, producing a strong susceptibility to external fields. Cuprates may have similar features, compatible with the large proximity effect of the very underdoped regime.
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En línea:
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https://eprints.ucm.es/46779/1/Mart%C3%ADnMayorV%20LIBRE%2028.pdf
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