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Maiorano, A. and Martín Mayor, Víctor and Ruiz Lorenzo, J. J. and Tarancón, A. (2007) Weak first-order transition in the three-dimensional site-diluted Ising antiferromagnet in a magnetic field. Physical review B, 76 (6). ISSN 1098-0121
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Official URL: http://dx.doi.org/10.1103/PhysRevB.76.064435
Abstract
We perform intensive numerical simulations of the three-dimensional site-diluted Ising antiferromagnet in a magnetic field at high values of the external applied field. Even if data for small lattice sizes are compatible with second-order criticality, the critical behavior of the system shows a crossover from second-order to first-order behavior for large system sizes, where signals of latent heat appear. We propose “apparent” critical exponents for the dependence of some observables on the lattice size for a generic disordered first-order phase transition.
Item Type: | Article |
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Additional Information: | © 2007 American Physical Society. This work has been partially supported by MEC Contracts Nos. BFM2003-08532, FISES2004-01399, FIS2004- 05073, and FIS2006-08533, by the European Commission Contract No. HPRN-CT-2002-00307, and by UCM-BCSH. We are grateful to T. Jörg and L. A. Fernández for interesting discussions. |
Uncontrolled Keywords: | Critical-behavior; 3 dimensions; Monte-Carlo; Phase-transitions; Random-systems; Model; Universality. |
Subjects: | Sciences > Physics > Physics-Mathematical models |
ID Code: | 45420 |
Deposited On: | 22 Nov 2017 10:43 |
Last Modified: | 22 Nov 2017 10:43 |
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