LAO BAO SRO OXYGEN(P)-METAL(D) EXCITONS AS THE MECHANISM OF HIGH-TEMPERATURE SUPERCONDUCTIVITY
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abstract
The discovery that cubic Ba0.6K0.4BiO3 is a high-temperature superconductor, with Tc 34 K, poses a challenge to theories based on CuO2 planes. On the other hand, this material, like all other currently-known high-Tc superconductors, contains metallic planes adjacent to insulating metal-oxide layers. In every case, these layers can support virtual oxygen p to metal d excitations. 1989.