Articles in peer-reviewed journals
|Aperiodicity-induced second-order phase transition in the 8-state potts model|
|Berche P.E., Chatelain C., Berche B.|
|Physical Review Letters 80 (1998) 297|
|DOI : 10.1103/PhysRevLett.80.297|
|ArXiv : cond-mat/9711205 [PDF]|
We investigate the critical behavior of the two-dimensional 8-state Potts model with an aperiodic distribution of the exchange interactions between nearest-neighbor rows. The model is studied numerically through intensive Monte Carlo simulations using the Swendsen-Wang cluster algorithm. The transition point is located through duality relations, and the critical behavior is investigated using finite-size scaling techniques at criticality. For strong enough fluctuations of the aperiodic sequence under consideration, a second-order phase transition is found. The exponents Î²/v and Î³/v are obtained at the new fixed point.