Glassy behaviour in high-T_c superconductors

Numerical simulations for an XY-spin-glass model are presented. The connection to recent experiments on high-Tc superconductors is outlined. In particular, the glass behaviour in experiments is reproduced by a two-dimensional (2d) model. A phase diagram important for future experiments is also provided. A substantial gain in Tc is predicted for enhanced couplings between plains. © 1988.