https://doi.org/10.1140/epjst/e2016-60337-x
Review
Scaling and universality in the phase diagram of the 2D Blume-Capel model
1 Institut für Theoretische Physik, Universität Leipzig, Postfach 100 920, 04009 Leipzig, Germany
2 Doctoral College for the Statistical Physics of Complex Systems, Leipzig-Lorraine-Lviv-Coventry (L⁴), 04009 Leipzig, Germany
3 Applied Mathematics Research Centre, Coventry University, Coventry, CV1 5FB, United Kingdom
4 Department of Physics, Section of Solid State Physics, University of Athens, Panepistimiopolis, GR 15784 Zografou, Greece
a e-mail: nikolaos.fytas@coventry.ac.uk
Received: 20 October 2016
Revised: 6 December 2016
Published online: 5 April 2017
We review the pertinent features of the phase diagram of the zero-field Blume-Capel model, focusing on the aspects of transition order, finite-size scaling and universality. In particular, we employ a range of Monte Carlo simulation methods to study the 2D spin-1 Blume-Capel model on the square lattice to investigate the behavior in the vicinity of the first-order and second-order regimes of the ferromagnet-paramagnet phase boundary, respectively. To achieve high-precision results, we utilize a combination of (i) a parallel version of the multicanonical algorithm and (ii) a hybrid updating scheme combining Metropolis and generalized Wolff cluster moves. These techniques are combined to study for the first time the correlation length of the model, using its scaling in the regime of second-order transitions to illustrate universality through the observed identity of the limiting value of ξ/L with the exactly known result for the Ising universality class.
© EDP Sciences, Springer-Verlag, 2017
