The specific heat of the rwo-dimensional +/-J Ising model
| dc.creator | Kitatani, H. | |
| dc.creator | Chino, T. | |
| dc.creator | Ohya, H. | |
| dc.date | 2002-12-24 | |
| dc.date.accessioned | 2026-07-07T02:48:54Z | |
| dc.date.available | 2026-07-07T02:48:54Z | |
| dc.description | The specific heat of the two-dimensional $\pm J$ Ising model has been investigated by the numerical transfer matrix method and Monte Carlo simulations from a new point of view. The region where a part of the specific heat takes the negative value has been investigated, which is characteristic of frustrated systems and reflects the non-trivial degeneracy of the ground state. The region mentioned above is found to be fairly large in the $p-T$ plane ($p$ is the concentration of the ferromagnetic bond and $T$ is the temperature). Moreover, it includes the Nishimori line. Namely, it includes a part of the paramagnetic-ferromagnetic phase boundary, on which the specific heat cannot diverge. The present result indicates that the specific heat does not diverge at least on a part of the paramagnetic-ferromagnetic phase boundary above the multicritical point, which is in conflict with previous results. | |
| dc.description | 12 pages, 6 figures, submitted to J. Phys. A | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0212579 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0212579 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/20591 | |
| dc.subject | Disordered Systems and Neural Networks | |
| dc.subject | Statistical Mechanics | |
| dc.title | The specific heat of the rwo-dimensional +/-J Ising model | |
| dc.type | text |