Abstract
We present Monte Carlo simulations in a generalized uniformly frustrated triangular-lattice model of XY spins. The frustration is varied by changing the relative strength, η, of one of the bonds of the unit cell. We found that the ground state transforms from ferromagnetic to antiferromagnetic along the variable bond direction for a critical value of\(\eta = - {1 \mathord{\left/ {\vphantom {1 {\sqrt 3 }}} \right. \kern-\nulldelimiterspace} {\sqrt 3 }}\). Simultaneously, the phase transition toward the paramagnetic state at high temperatures changes from purely Kosterlitz-Thouless like to one of mixed character.
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Pastoriza, H., Martinoli, P. Phase transitions in triangular arrays of XY spins with variable couplings. Czech J Phys 46 (Suppl 4), 1905–1906 (1996). https://doi.org/10.1007/BF02570944
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DOI: https://doi.org/10.1007/BF02570944