ABSTRACT
In this chapter, the authors focus on the X-ray photoelectron spectroscopy studies of core levels for Thallium-based cuprate superconductors. It is very important to study the core levels of constituent atoms in the Thallium-based cuprate superconductors in order not only to characterize the films and the bulks synthesized, but also to elucidate the electronic structures. In general, one of the characteristics of high-Tc superconductors is that insulator materials become metallic with hole or electron doping, with the result that the carrier-doped materials show superconductivity. Detailed band structures of Thallium-based cuprate superconductors could be studied for single crystals using ultraviolet photoelectron spectroscopy and inverse photoelectron spectroscopy, among which the later is an important technique for the study of unoccupied electronic states because the carriers are holes for many high-Tc cuprate superconductors.
