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Título:
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First-order transition in a three-dimensional disordered system
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Autores:
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Fernández Pérez, Luis Antonio ;
Gordillo Guerrero, A. ;
Martín Mayor, Víctor ;
Ruiz Lorenzo, J. J.
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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, 2008-02-08
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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
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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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We present the first detailed numerical study in three dimensions of a first-order phase transition that remains first order in the presence of quenched disorder (specifically, the ferromagnetic-paramagnetic transition of the site-diluted four states Potts model). A tricritical point, which lies surprisingly near the pure-system limit and is studied by means of finite-size scaling, separates the first-order and second-order parts of the critical line. This investigation has been made possible by a new definition of the disorder average that avoids the diverging-variance probability distributions that plague the standard approach. Entropy, rather than free energy, is the basic object in this approach that exploits a recently introduced microcanonical Monte Carlo method.
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En línea:
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https://eprints.ucm.es/38265/1/Fern%C3%A1ndezP%C3%A9rezLuisAntonio25LIBRE.pdf
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