ANTIPARAMAGNON IN D-WAVE SUPERCONDUCTORS

We have shown recently two dimensional t-J model gives an excellent de scription of dynamical spin fluctuation as seen by inelastic neutron s cattering from La1.86Sr0.14CUO4 by Mason et al and from YBa2Cu3O6+x, b y Rossat-Mignod et al. In this comparison d-wave superconductor is ind ispensable. Further the strong spin fluctuation (i.e. antiparamagnon) gives rise to almost T-linear resistance and large almost T-independen t thermoelectric power as observed in high T-c cuprates.