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

被引:42
作者
Kawamura, H
Li, MS
机构
[1] Faculty of Engineering and Design, Kyoto Institute of Technology, Kyoto 606, Sakyo-ku
来源
PHYSICAL REVIEW B | 1996年 / 54卷 / 01期
关键词
D O I
10.1103/PhysRevB.54.619
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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 self-inductance. 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 U(1) 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 U(1) gauge symmetry occurs where nonlinear susceptibility exhibits only a very weak anomaly. Implications to experiments on high-T-c ceramics are discussed.
引用
收藏
页码:619 / 636
页数:18
相关论文
共 81 条
[81]   NONLINEAR ELECTRODYNAMICS AND NONRESONANT MICROWAVE-ABSORPTION IN CERAMIC SUPERCONDUCTORS [J].
XIA, TK ;
STROUD, D .
PHYSICAL REVIEW B, 1989, 39 (07) :4792-4795