title: Polarization-dependent XANES study of Bi2Sr2Ca(1-x)Pr(x)Cu2O8-delta insulating single crystal.
abstract: Pr doping has been extensively studied in cuprate superconductors to understand the mechanism of quenching of superconductivity in cuprate perovskites. Experience has revealed that it acts differently in different cuprate perovskites. We have made high resolution polarization XANES measurements on a Pr-doped single crystal within the ab-plane on the Cu K and Pr L III absorption edges to ascertain the valence state of Pr cation and thereby try learning how it is quenching superconductivity in the present case. Our results show that besides the Pr quenching holes the possibility of its localizing some holes through hybridization with O 2p and Cu 3d cannot be ruled out.
authors.affiliation: Physics Department, Rajasthan University, Jaipur, India. krishna@jp1.dot.net.in
authors.forename: K B
authors.initials: KB
authors.lastname: Garg
authors.forename: S
authors.initials: S
authors.lastname: Dalela
authors.forename: B
authors.initials: B
authors.lastname: Dalela
authors.forename: S
authors.initials: S
authors.lastname: Venkatesh
authors.forename: J F
authors.initials: JF
authors.lastname: Lee
authors.forename: J H
authors.initials: JH
authors.lastname: Choy
authors.forename: D
authors.initials: D
authors.lastname: Chaturvedi
authors.forename: R K
authors.initials: RK
authors.lastname: Singhal
authors.forename: J
authors.initials: J
authors.lastname: Garcia-Ruiz