Pseudogap and Precursor Superconductivity Study of Zn doped YBCO

In this thesis, the pseudogap and the precursor superconducting state, which are of great importance in clarifying the superconductivity mechanism in high-temperature cuprate superconductors, are investigated with a c-axis optical study in YBa₂(Cu_1-xZn_x)₃O_y. Testing was performed over a wide energy range with smaller temperature intervals for several Zn-substituted samples, as well as for several carrier-doping levels.

A spectral weight (SW) analysis, in which the pseudogap behavior can be...