Both the square and triangular Ising antiferromagnetic systems with next-nearest neighbour interactions are studied by a new efficient entropic scheme. Using the energy distribution and order parameter's fourth order cumulant it is illustrated that the two models behave quite differently, For the square model we establish strong numerical evidence showing a continuous transition scaling, whereas for the triangular model a first-order transition is verified. Our results are compared with the existing predictions and controversies in the literature.
|Journal||Reviews on Advanced Materials Science|
|Publication status||Published - Apr 2007|
Bibliographical noteThe full text is not available on the repository.
- MONTE-CARLO SIMULATIONS
- 2ND-NEIGHBOR INTERACTIONS
- VARIATIONAL APPROXIMATIONS
Malakis, A., Kalozoumis, P., & Fytas, N. G. (2007). Continuous- and first-order phase transitions in Ising anti ferromagnets with next-nearest-neighbour interactions. Reviews on Advanced Materials Science, 14(1), 1-10.