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Phase transitions in a frustrated Ising antiferromagnet on a square lattice.
- Source :
-
Physical Review E: Statistical, Nonlinear & Soft Matter Physics . Mar2015, Vol. 91 Issue 3-A, p1-6. 6p. - Publication Year :
- 2015
-
Abstract
- The phase transitions occurring in the frustrated Ising square antiferromagnet with first- (J1 < 0) and second-nearest-neighbor (J2 < 0) interactions are studied within the framework of the effective-field theory with correlations based on the different cluster sizes and for a wide range of R = J2/\J1 |. Despite the simplicity of the model, it has proved difficult to precisely determine the order of the phase transitions. In contrast to the previous effective-field study, we have found a first-order transition line in the region close to R = --0.5 not only between the superantiferromagnetic and paramagnetic (R < - 0.5) but also between antiferromagnetic and paramagnetic (R > --0.5) phases. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15393755
- Volume :
- 91
- Issue :
- 3-A
- Database :
- Academic Search Index
- Journal :
- Physical Review E: Statistical, Nonlinear & Soft Matter Physics
- Publication Type :
- Academic Journal
- Accession number :
- 102232736
- Full Text :
- https://doi.org/10.1103/PhysRevE.91.032145