ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Many-body effects in Cu 2p x-ray photoemission of Bi2Sr2CaxCu1+xO6+2x (x=0,1,2), La2−xSrxCuO4 (x=0,0.13), and ErBa2Cu3O7−x,y (x〈y) were observed and correlations between the many-body effects and high-Tc superconductivity of cuprate superconductors were reviewed. For the Bi2Sr2CaxCu1+xO6+2x (x=0,1,2) and La2−xSrxCuO4 (x=0,0.13) systems, proper high-Tc superconductivity was realized by increasing the transfer integral and the interaction strength of the Cu-O bond of the crystal determined the superconducting properties. However, for the ErBa2Cu3O7−x and YBa2Cu3O7−x systems, 90 K superconductivity was realized by increasing the charge transfer energy. The extended valence state including the Cu, Ba, and O valence states in the crystal determined the superconducting properties of the ErBa2Cu3O7−x and YBa2Cu3O7−x systems.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.355011
Permalink