¡Nos trasladamos! E-Prints cerrará el 7 de junio.

En las próximas semanas vamos a migrar nuestro repositorio a una nueva plataforma con muchas funcionalidades nuevas. En esta migración las fechas clave del proceso son las siguientes:

Es muy importante que cualquier depósito se realice en E-Prints Complutense antes del 7 de junio. En caso de urgencia para realizar un depósito, se puede comunicar a docta@ucm.es.

First Order Phase Transition in a 3D disordered system



Downloads per month over past year

Fernández Pérez, Luis Antonio and Gordillo Guerrero, A. and Martín Mayor, Víctor and Ruiz Lorenzo, J. J. (2008) First Order Phase Transition in a 3D disordered system. AIP conference proceedings: large scale simulations of complex systems, condensed matter and fusion plasma, 1071 . pp. 46-57. ISSN 0094-243x

[thumbnail of FernándezPérezLuisAntonio26LIBRE.pdf]

Official URL: http://dx.doi.org/10.1063/1.3033359


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.

Item Type:Article
Additional Information:

© 2008 American Institute of Physics. BIFI International Congress (111th. 2008. Zaragoza, Spain). This work has been partially supported by MEC through contracts No. FIS2004-0I399, FIS2006-08533-C03, FIS2007-60977 and by CAM and BSCH. Computer time was obtained at BIFI, UCM and UEx and (~ 50%) in the Mare Nostrum. The authors thankfully acknowledge the computer resources and technical expertise provided by the Barcelona Supercomputing Center.

Uncontrolled Keywords:Field ising-model; Bond Potts models; Critical exponents; Critical-behavior; Monte-Carlo.
Subjects:Sciences > Physics
Sciences > Physics > Physics-Mathematical models
ID Code:38301
Deposited On:05 Jul 2016 07:51
Last Modified:05 Jul 2016 07:51

Origin of downloads

Repository Staff Only: item control page