LaO/BaO/SrO oxygen(p)-metal(d) excitons as the mechanism of high-temperature superconductivity
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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.
author list (cited authors)
Richert, B. A., & Allen, R. E.