We study the phase transition behavior of a frustrated Heisenberg model on a stacked triangular lattice by Monte Carlo simulations. The model has three types of interactions: the ferromagnetic nearest-neighbor interaction J 1 and antiferromagnetic third nearest-neighbor interaction J 3 in each triangular layer and the ferromagnetic interlayer interaction JâŠ¥. Frustration comes from the intralayer interactions J1 and J3. We focus on the case that the order parameter space is SO(3)×C3. We find that the model exhibits a first-order phase transition with breaking of the SO(3) and C3 symmetries at finite temperature. We also discover that the transition temperature increases but the latent heat decreases as J âŠ¥/J1 increases, which is opposite to the behavior observed in typical unfrustrated three-dimensional systems.
|ジャーナル||Physical Review E - Statistical, Nonlinear, and Soft Matter Physics|
|出版物ステータス||Published - 2013 11 26|
ASJC Scopus subject areas
- Condensed Matter Physics
- Statistical and Nonlinear Physics
- Statistics and Probability