| dc.creator | Lopes, R. J. C. | |
| dc.creator | Moura, A. R. | |
| dc.date | 2018-09-24T14:33:33Z | |
| dc.date | 2018-09-24T14:33:33Z | |
| dc.date | 2018-06-05 | |
| dc.date.accessioned | 2023-09-27T21:12:40Z | |
| dc.date.available | 2023-09-27T21:12:40Z | |
| dc.identifier | 0375-9601 | |
| dc.identifier | https://doi.org/10.1016/j.physleta.2018.03.050 | |
| dc.identifier | http://www.locus.ufv.br/handle/123456789/21965 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/8956605 | |
| dc.description | We study the thermodynamics of the classical anisotropic antiferromagnetic Heisenberg model in a checkerboard lattice. The checkerboard lattice is distinguished from the antiferromagnetic square lattice (with coupling constant J) by the presence of a diagonal crossing (coupling constant J′) in half of the sites. This lattice model is the direct analog of the three-dimensional pyrochlore lattice on a two-dimensional surface. Besides, we considered a single-ion anisotropy D that breaks the O(3) symmetry and contributes to planar spin fields. Since the model is two-dimensional endowed with an O(2) symmetry, a Berezinskii–Kosterlitz–Thouless (BKT) transition is expected to take place. We also investigated the BKT temperature as a function of the coupling constants J′ and D. The problem is developed through a continuous representation given by the O(3) Nonlinear Sigma Model (NLSM). Computer simulations were also carried out, and the results were in accordance with the analytical model. | |
| dc.format | pdf | |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | Physics Letters A | |
| dc.relation | Volume 382, Issue 22, Pages 1492-1498, June 2018 | |
| dc.rights | Elsevier B. V. | |
| dc.subject | Checkerboard lattice | |
| dc.subject | Antiferromagnetic Heisenberg model | |
| dc.subject | BKT transition | |
| dc.subject | O(3) Nonlinear Sigma Model | |
| dc.subject | Monte Carlo simulation | |
| dc.title | Possible extinction of Berezinskii–Kosterlitz–Thouless transition by diagonal interactions in the checkerboard lattice | |
| dc.type | Artigo | |
