Local structure and T-c suppression in Bi2Sr2Ca1-xYx(Cu1-yZny)(2)O8+delta superconductor at 1/8 doping

Authors
Saini, NL Lanzara, A Natali, F Bianconi, A Akoshima, M Koike, Y Oyanagi, H
Citation
Nl. Saini et al., Local structure and T-c suppression in Bi2Sr2Ca1-xYx(Cu1-yZny)(2)O8+delta superconductor at 1/8 doping, J SYNCHROTR, 6, 1999, pp. 752-754
Citations number
19
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF SYNCHROTRON RADIATION
ISSN journal
09090495 → ACNP
Volume
6
Year of publication
1999
Part
3
Pages
752 - 754
Database
ISI
SICI code
0909-0495(19990501)6:<752:LSATSI>2.0.ZU;2-9
Abstract
Local structural studies on the Bi2Sr2Ca1-xYx(Cu1-yZny)(2)O8+delta supercon ductor have been carried out by Cu K-edge X-ray absorption spectroscopy. Th e Cu K-edge XANES spectra show a systematic evolution with the hole doping for y=0.0 while there is anomalous relaxation of the CuO2 plane in the unde rdoped regime for y=0.025. Our results suggest that the 1/8 doping is a spe cial doping below which the local structure of the CuO2 plane shows strong sensitivity to extrinsic effects. The XANES features, associated with local structural distortions of the CuO2 plane are discussed.