Phase transitions and thermodynamic properties of the antiferromagnetic q=5 clock model on a triangular lattice with second-nearest-neighbor interactions

M.K. Badiev, A.K. Murtazaev, M.A. Magomedov and M.K. Ramazanov

Physica A: Statistical Mechanics and its Applications, 2025, vol. 668, issue C

Abstract: The phase transitions, magnetic structures of the ground state, and thermodynamic properties of a q= 5 antiferromagnetic Potts model on a triangular lattice with exchange interactions of first- J1 and second-nearest neighbors J2 are studied by the Monte Carlo method. Computations are carried out in the range of the second-neighbor-exchange interaction values –2.4 ≤ J2≤ 0.0 with fixed J1= ̶ 1. The magnetic structures for the ground state in the addressed interval are derived. A phase diagram of the critical temperature versus the second-nearest-neighbor interaction value is plotted. The antiferromagnetic interactions of second-neighbors are found to result in a change of a second-order phase transition to a first-order one.

Keywords: Phase transitions; Monte Carlo method; Clock model; Magnetic structures (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:668:y:2025:i:c:s0378437125002602

DOI: 10.1016/j.physa.2025.130608

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