Crossref journal-article
AIP Publishing
Journal of Applied Physics (317)
Abstract

Many condensed matter systems, ranging from adsorbed surfaces to bulk magnets, are microscopically modelled by interacting q-state Potts spins, arrayed in d dimensions. A changeover from second-order phase transitions at q≤qc(d) to first-order transitions at q≳qc can be understood as a condensation of effect vacancies, which are patches of local disorder favored by entropy. Accordingly, the renormalization-group treatment of Potts models is within context of Potts-lattice-gas models, where critical and tricritical fixed points occur at low q, but merge and annihilate at qc. This picture has led to exact tricritical exponents in two dimensions. It is also consistent with recent experimental results on intercalated systems in three dimensions. Effective vacancies in pure Potts models have also been studied by Monte Carlo simulation. Their effective chemical potential can be controlled by a four-point interaction, which proved useful in Monte Carlo renormalization-group studies.

Bibliography

Berker, A. N., & Andelman, D. (1982). First- and second-order phase transitions in Potts models: Competing mechanisms (invited). Journal of Applied Physics, 53(11), 7923–7926.

Authors 2
  1. A. Nihat Berker (first)
  2. David Andelman (additional)
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Dates
Type When
Created 22 years, 6 months ago (Feb. 14, 2003, 6:21 p.m.)
Deposited 1 year, 6 months ago (Feb. 4, 2024, 8:27 p.m.)
Indexed 1 year, 6 months ago (Feb. 4, 2024, 8:40 p.m.)
Issued 42 years, 9 months ago (Nov. 1, 1982)
Published 42 years, 9 months ago (Nov. 1, 1982)
Published Print 42 years, 9 months ago (Nov. 1, 1982)
Funders 0

None

@article{Berker_1982, title={First- and second-order phase transitions in Potts models: Competing mechanisms (invited)}, volume={53}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.330231}, DOI={10.1063/1.330231}, number={11}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Berker, A. Nihat and Andelman, David}, year={1982}, month=nov, pages={7923–7926} }