Actes de conférences
|3D bond-diluted 4-state Potts model: A Monte Carlo study|
|Chatelain C., Berche P.-E., Berche B., Janke W.|
|Nuclear Physics B - Proceedings Supplements 106 (2002) 899|
|DOI : 10.1016/S0920-5632(01)01879-5|
We report on a Monte Carlo study of the three-dimensional bond-diluted 4-state Potts model which, in the pure case, undergoes a strong first-order phase transition. Subject to quenched, random disorder one expects a softening to a continuous transition from a certain disorder strength on. Employing a combination of cluster algorithms, multicanonical methods and reweighting techniques, we obtain strong numerical evidence for the existence of a tricritical point separating the first- and second-order regimes and give an estimate of its location.