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Istituto dei materiali per l'elettronica ed il magnetismo     
Rastelli E., Regina S., Tassi A. Monte Carlo simulations on a triangular Ising antiferromagnet with nearest and next-nearest interactions. In: Physical Review B, vol. 71 (17) article n. 174406. APS, 2005.
 
 
Abstract
(English)
Monte Carlo sMCd simulations on the triangular Ising antiferromagnet with antiferromagnetic next-nearest neighbor interaction points out the existence of a first order phase transition between the low temperature two-sublattice antiferromagnetic phase and the high temperature paramagnetic phase. This scenario differs from that observed when the next-nearest neighbor interaction is ferromagnetic, where a Berezinskii-Kosterlitz-Thouless phase occurs at intermediate temperature between the three-sublattice ferrimagnetic phase at low temperature and the paramagnetic phase at high temperature.
URL: http://prb.aps.org/abstract/PRB/v71/i17/e174406
DOI: 10.1103/PhysRevB.71.174406
Subject 75.10.Hk
75.30.Ds


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