Stability of a two-sublattice spin-glass model

dc.creator	Yokoi Carlos S. O.
dc.creator	Costa Francisco A. da
dc.date	2003
dc.date.accessioned	2013-06-01T11:05:13Z
dc.date.available	2013-06-01T11:05:13Z
dc.date.issued	2013-06-01
dc.identifier	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332003000400048
dc.identifier	http://www.doaj.org/doaj?func=openurl&genre=article&issn=01039733&date=2003&volume=33&issue=4&spage=899
dc.identifier.uri	http://koha.mediu.edu.my:8181/jspui/handle/123456789/8408
dc.description	We study the stability of the replica-symmetric solution of a two-sublattice infinite-range spin-glass model, which can describe the transition from an antiferromagnetic to a spin-glass state. The eigenvalues associated with replica-symmetric perturbations are in general complex. The natural generalization of the usual stability condition is to require the real part of these eigenvalues to be positive. The necessary and sufficient conditions for all the roots of the secular equation to have positive real parts is given by the Hurwitz criterion. The generalized stability condition allows a consistent analysis of the phase diagram within the replica-symmetric approximation.
dc.publisher	Sociedade Brasileira de Física
dc.source	Brazilian Journal of Physics
dc.title	Stability of a two-sublattice spin-glass model

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