Abstract
Abstract With only the two-body Coulomb repulsion taken into account, a theoretical phase diagram for any metal includes the following phases (at least): an ordinary paramagnetic Fermi liquid, itinerant ferromagnetism, a CDW phase and an antiferromagnetic phase (either of which can become an insulator), and — surprisingly — a superconducting phase. With specific reference to CuO2 -based solids, it will be shown that the screened Coulomb force in a layered metal is not necessarily inimical to superconductivity, and can even account for the new phenomenon of high Tc superconductivity. Under certain circumstances, the two particles in each Cooper pair are in a relative s-state, but on adjacent layers, and Tc can exceed 100K.
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