Multiplicity of ordered phases in frustrated systems obtained from hard-spin mean-field theory

Kaya H., Berker A.

PHYSICAL REVIEW E, cilt.62, 2000 (SCI İndekslerine Giren Dergi) identifier identifier


Random quenched dilution of the triangular-lattice antiferromagnetic Ising model locally relieves frustration, leading to ordering phenomena. We have studied this system, under such dilution of one sublattice, using hard-spin mean-field theory. After a threshold dilution, two sublattices develop nonzero magnetizations of equal magnitude and opposite signs, as all three sublattices exhibit. spin-glass order. In this phase, multiple sets of ordered solutions occur. A phase diagram is obtained in dilution fraction and temperature.