Strong-disorder paramagnetic-ferromagnetic fixed point in the square-lattice +- J Ising model
| Autor: | Toldin, F. Parisen, Pelissetto, A., Vicari, E. |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | J. Stat. Phys. 135 (2009), 1039 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1007/s10955-009-9705-5 |
| Popis: | We consider the random-bond +- J Ising model on a square lattice as a function of the temperature T and of the disorder parameter p (p=1 corresponds to the pure Ising model). We investigate the critical behavior along the paramagnetic-ferromagnetic transition line at low temperatures, below the temperature of the multicritical Nishimori point at T*= 0.9527(1), p*=0.89083(3). We present finite-size scaling analyses of Monte Carlo results at two temperature values, T=0.645 and T=0.5. The results show that the paramagnetic-ferromagnetic transition line is reentrant for T Comment: 32 pages, added refs and a discussion on hyperscaling |
| Databáze: | arXiv |
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