Analysis of High T_c Phase Diagram; Pseudogap and Superconducting Phases

摘要

Emphasis on the analysis of high T_c phase diagrams is made by showing coupling between the charge and spin degrees of freedom. Based on an improved SU(2) slave-boson approach which shows the coupling, we derive a satisfactory phase diagram of high T_c cuprates which displays both the superconducting and pseudogap phases in the plane of temperature vs. hole doping rate.