A structural-based microscopic theory on high-temperature cuprate superconductors

Based entirely on the cuprate structure, a microscopic theory for high-temperature superconductivity is proposed. This theory produces quantitative fits to the normal phase properties such as Hall effect, resistivity, thermoelectric power, etc. It also reveals the existence of a pseudo-gap structure that has nodes along the diagonals of the basal plane. In the superconducting phase, an inverse parabolic dependences of T-c on hole density is a natural consequence. The optimum T, value derived from the corresponding intrinsic hole density obtained from electronic structure agrees with the value obtained experimentally. This theory can also explain the observation of a strong spin fluctuation near T, in the Y-Ba-2-CU3O7 (YBCO) and the absence of such in the Bi2Sr2CaCu2O8 (BiSCCO) system. (C) 2004 Elsevier B.V. All rights reserved.