Phase diagram of the antiferromagnetic 3-state Potts model on a bcc lattice with competing interactions

D.R. Kurbanova, M.A. Magomedov, M.R. Dzhamaludinov, M.K. Ramazanov and A.K. Murtazaev

Physica A: Statistical Mechanics and its Applications, 2025, vol. 676, issue C

Abstract: The antiferromagnetic 3-state Potts model on a body-centered cubic lattice with competing interactions of the first (J1) and second (J2) nearest-neighbor was studied by the Monte Carlo method. A phase diagram was plotted. The competition of exchange interactions in the range −2/3 < J2 < 0 was determined to result in a phase separation. In the low-temperature region, an ordered phase, lying inside the phase with broken sublattice symmetry, was found. The second nearest-neighbor interactions leads to a change in the phase transition order. In addition, at J2 ≤ −2/3, a phase with broken sublattice symmetry state of a different type arises. Such features are not observed at the ferro-antiferromagnetic interaction. The critical exponents for the second-order phase transition are estimated using scaling relations.

Keywords: Potts model; Phase transition; Phase diagram; Monte Carlo; Wang-Landau algorithm; Competing interactions (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:676:y:2025:i:c:s0378437125005229

DOI: 10.1016/j.physa.2025.130870

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