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arXiv · 1805.01675

Thermodynamic and critical properties of an antiferromagnetically stacked triangular Ising antiferromagnet in a field

M. Žukovič·M. Borovský·A. Bobák
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Abstract

We study a stacked triangular lattice Ising model with both intra- and inter-plane antiferromagnetic interactions in a field, by Monte Carlo simulation. We find only one phase transition from a paramagnetic to a partially disordered phase, which is of second order and 3D XY universality class. At low temperatures we identify two highly degenerate phases: at smaller (larger) fields the system shows long-range ordering in the stacking direction (within planes) but not in the planes (stacking direction). Nevertheless, crossovers to these phases do not have a character of conventional phase transitions but rather linear-chain-like excitations.

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M. Žukovič, M. Borovský, A. Bobák. 2018-05-04. Thermodynamic and critical properties of an antiferromagnetically stacked triangular Ising antiferromagnet in a field. https://doi.org/10.1016/j.physleta.2018.03.026

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