2 8 A pr 2 00 3 Intraplanarcouplings in theCuO 2 latticeof cuprate superconductors

We have investigated the doping dependencies of the basal areas in single-layer high-Tc cuprates La2−xSrxCuO4 and HgBa2CuOx, as well as in two-layer Y1−yCayBa2Cu3Ox and HgBa2CaCu2Ox. The basal areas not only tend to shrink on hole doping, as expected from single electron quantum chemistry, but exhibit also a “hump” around optimum doping. We attribute the… (More)

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