Reentrant phases in the ± J spin glass

Shirin Haque-Copilah, Aldwyn Tang Kai and Naeem Jan

Physica A: Statistical Mechanics and its Applications, 1996, vol. 231, issue 4, 397-407

Abstract: We consider an enlarged phase space of the ±J spin glass which includes the dilute Ising model and the frustrated system. The three orthogonal axes in this space are: (i) The fraction of ferro- to antiferro-magnetic bonds, p; (ii) the ratio of the strengths of the antiferro- to ferromagnetic interacions, q; and (iii) the temperature, T. Within this phase space we observe extended regions of the low-temperature spin-glass phase which is characterized by a unique distribution of the local-order parameter. We observe reentrant phase transitions: for fixed p and q with varying T the distribution of the local order parameter shows paramagnetic, ferromagnetic and then spin-glass phases; for fixed p and T and varying q the distribution shows ferromagnetic to paramagnetic and then spin-glass phases.

Date: 1996
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:231:y:1996:i:4:p:397-407

DOI: 10.1016/0378-4371(96)00115-X

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