Abstract

On the basis of the spin-polaron pair model with s-wave pairing recently developed by Kamimura, Matsuno and Saito, the origin of the x dependence of Tc and that of a high value of Tc in La2-xSrxCuO4 are clarified. Predictions are also made on (i) the coexistence of the superconducting phase and spin fluid phase and (ii) the simultaneous occurrence of the superconducting phase and the metal-insulator transition. Anomalous behaviour of NMR and Hall effects in high Tc copper oxides are discussed in terms of the spin-polaron pair model.

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