Some properties of high-Tc superconductors

We have calculated some properties of the high-Tc superconductors by using the electron pairing induced by holes model proposed by us recently. The predicted dependence of Tc on the hole concentration δ agrees qualitatively with the experimental data of Shafer et al. [Phys. Rev. B 36, 4047 (1987)]. The dependence of the normalized order parameter and the normalized gap energy on the reduced temperature are very close to the one given by the BCS theory of conventional superconductors. The ratio of the zero-temperature gap energy and Tc is near 1.6. The dependence of the density of states for quasiparticles on energy is found to be asymmetric. The carrier effective mass for 90-K superconductors is ∼4me