X-ray diffuse scattering experiments on bismuth based high Tc superconductors

✍ Scribed by R. Comes; M. Izquierdo; S. Megtert; P.A. Albouy; J. Avila; M.A. Valbuena; G. Gu; J.S. Abell; M.C. Asensio

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 181 KB
• Volume: 460-462
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2007.03.154

✦ Synopsis

A detailed X-ray diffuse scattering study of the recently found two dimensional (2D) displacive short range order (SRO) superstructure, with doubled periodicity along the orthorhombic a direction from the high T c superconductors Bi 2 Sr 2 CaCu 2 O 8+d (BISCO-2212) is reported. The investigation has been extended to high and low temperatures for optimally doped crystals, to crystals with different doping levels and to the one layer compound Bi 2 Sr 2 CuO 6+d (BISCO-2201). The most striking feature is that both, the intensity of the diffuse scattering and the extent of the 2DSRO vary with doping as the critical temperature, T c . These findings show that these short range ordering features are of importance for a better understanding of high T c materials, at least those from the BISCO family.