Emerging Critical Behavior at a First-Order Phase Transition Rounded by Disorder
We investigate the two-dimensional four-color Ashkin-Teller model by means of large-scale Monte-Carlo simulations. We demonstrate that the first-order phase transition of the clean system is destroyed by random disorder introduced via site dilution. The critical behavior of the emerging continuous transition belongs to the clean two-dimensional Ising universality class, apart from logarithmic corrections. These results confirm perturbative renormalization-group predictions; they also agree with recent findings for the three-color case, indicating that the critical behavior is universal.
A. K. Ibrahim and T. Vojta, "Emerging Critical Behavior at a First-Order Phase Transition Rounded by Disorder," Fortschritte der Physik / Progress of Physics, vol. 65, no. 2018-06-08, Wiley-VCH Verlag, Jun 2017.
The definitive version is available at https://doi.org/10.1002/prop.201600018
Keywords and Phrases
Critical Behavior; Disorder; Phase Transition
International Standard Serial Number (ISSN)
Article - Journal
© 2017 Wiley-VCH Verlag, All rights reserved.