Dynamics of diluted antiferromagnetic Ising spin systems on the fcc lattice

Cieplak, Marta Z.; Gawron, T. R.; Cieplak, Marek

doi:10.1103/physrevb.39.6757

Phys. Rev. B

1989

DOI: 10.1103/physrevb.39.6757

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Dynamics of diluted antiferromagnetic Ising spin systems on the fcc lattice

Marta Z. Cieplak

T. R. Gawron

Marek Cieplak

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Cited by 2 publications

References 42 publications

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Monte Carlo studies of the ordering of ceramic superconductors: Chiral-glass, orbital-glass, and nonlinear susceptibilities

Kawamura

1996

Phys. Rev. B

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Static and dynamic properties of the intergranular ordering of ceramic superconductors are studied by Monte Carlo simulations on a three-dimensional lattice model of a Josephson-junction array with finite selfinductance. Both cases of d-wave and s-wave pairing symmetries are studied. In the case of d-wave ceramics, intrinsic frustration effects combined with quenched randomness lead to the glassy behavior reminiscent of the spin glass even in zero magnetic field. It is found that the zero-field nonlinear susceptibility exhibits a negatively divergent behavior, suggesting the occurrence of a cooperative transition into an ordered state characterized by the random freezing of chirality or flux. In this ''chiral-glass'' state, global Z 2 time-reversal symmetry appears to be broken spontaneously with keeping the U͑1͒ gauge symmetry. Dynamic simulations on the linear ac susceptibility suggest that d-wave ceramics exhibits much stronger dissipation than s-wave ceramics in the low-frequency regime. In the case of s-wave ceramics, standard superconducting transitions with broken U͑1͒ gauge symmetry occurs where nonlinear susceptibility exhibits only a very weak anomaly. Implications to experiments on high-T c ceramics are discussed.

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Monte Carlo studies of the ordering of ceramic superconductors: Chiral-glass, orbital-glass, and nonlinear susceptibilities

Kawamura

1996

Phys. Rev. B

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Second harmonics and compensation effect in ceramic superconductors

1999

Phys. Rev. B

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A three-dimensional lattice of the Josephson junctions with a finite self-conductance is employed to model the ceramic superconductors. The nonlinear ac susceptibility and the compensation effect are studied by Monte Carlo simulations in this model. The compensation effect is shown to be due to the existence of the chiral glass phase. We demonstrate, in agreement with experiments, that this effect may be present in the ceramic superconductors which show the paramagnetic Meissner effect.Comment: 6 pages, latex, 4 figures, Phys. Rev. B (accepted

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Dynamics of diluted antiferromagnetic Ising spin systems on the fcc lattice

Cited by 2 publications

References 42 publications

Monte Carlo studies of the ordering of ceramic superconductors: Chiral-glass, orbital-glass, and nonlinear susceptibilities

Monte Carlo studies of the ordering of ceramic superconductors: Chiral-glass, orbital-glass, and nonlinear susceptibilities

Second harmonics and compensation effect in ceramic superconductors

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