The main objective of this workshop was to review and discuss the electronic and chemical properties of layered cuprate superconductors. These are doped antiferromagnetic (AFM) insulators, and there is the possibility of a dynamic phase separation into metallic clusters and AFM areas. A clarification on the existence and the mechanism of such a phase separation is believed to be crucial for the understanding of high-Tc superconductivity in cuprates. On one hand, theoretical and recent experiemental indications in favour of this possibility were presented, on the other hand experimental papers expressing more skeptical views were also delivered. Related work on phase separations of chemical and structural origin was also included, followed by contributions on the question; "If phase separation is present, what is the pairing mechanism in the metallic clusters?".
Frustrated phase separation and high temperature superconductivity, V. Emery and S. A. Kivelson; phase separation and photo-induced high-Tc superconductivity in the cuprates, G. Yu, et al; neutron scattering studies of the spin dynamics in La2-xSrCu04, S.M. Hayden, et al; percolative phase separation and high-Tc superconductivity, E. Sigmund, et al; phase separation in cuprate superconductors from NMR and microwave absorption measurements, M. Mehring, et al; electronic structure and phase separation in superconducting cuprates, C. di Castro and M. Grilli; the virtual exciton mechanism of superconductivity, M. Cyrot; linear arrays of non homogeneous cu sites in the Cu02 and YBa2Cu30x studied by mossbauer spectroscopy, P. Imbert, et al; phase diagram and transport studies on La2-xSrxCu04, H. Takagi, et al; static and dynamic transport aspects of phase separation, B. Bucher and P. Wachter. (Part contents).