|
Título:
|
First Order Phase Transition in a 3D disordered system
|
|
Autores:
|
Fernández Pérez, Luis Antonio ;
Gordillo Guerrero, A. ;
Martín Mayor, Víctor ;
Ruiz Lorenzo, J. J.
|
|
Tipo de documento:
|
texto impreso
|
|
Editorial:
|
American Institute of Physics, 2008
|
|
Dimensiones:
|
application/pdf
|
|
Nota general:
|
info:eu-repo/semantics/openAccess
|
|
Idiomas:
|
|
|
Palabras clave:
|
Estado = Publicado
,
Materia = Ciencias: Física
,
Materia = Ciencias: Física: Física-Modelos matemáticos
,
Tipo = Artículo
|
|
Resumen:
|
We present a detailed numerical study on the effects of adding quenched impurities to a three dimensional system which in the pure case undergoes a strong first order phase transition (specifically, the ferromagnetic/paramagnetic transition of the site-diluted four states Potts model). We can state that the transition remains first-order in the presence of quenched disorder (a small amount of it) but it turns out to be second order as more impurities are added. A tricritical point, which is studied by means of Finite-Size Scaling, separates the first-order and second-order parts of the critical line. The results were made possible by a new definition of the disorder average that avoids the diverging-variance probability distributions that arise using the standard methodology. We also made use of a recently proposed microcanonical Monte Carlo method in which entropy, instead of free energy, is the basic quantity.
|
|
En línea:
|
https://eprints.ucm.es/38301/1/Fern%C3%A1ndezP%C3%A9rezLuisAntonio26LIBRE.pdf
|
