Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Observation of Changes in the Atomic and Electronic Structure of Single-Crystal Yba2Cu3O6.6 Accompanying Bromination

Published

Author(s)

L M. Dieng, T A. Tyson, Mark Croft, T Dogan, C Y. Kim, Joseph Woicik, J Grow, A Y. Ignatov

Abstract

To understand the role of bromination in the recovery of superconductivity in underdoped YBCO, the spatially resolved local structural changes in brominated single crystals have been measured and compared to those in a normal crystal. In polarized x-ray absorption measurements direct evidence for the transfer of hole density into the CuO2 planes due to bromination were observed. Measurements of the local atomic structure about the Ba, Cu and Br atoms, as well as c-axis x-ray diffraction data, reveal that the brominated YBCO structure has significant structural disorder. Modeling of the x-ray absorption data reveal that Br exists as BaBr2.
Citation
Physical Review B (Condensed Matter and Materials Physics)
Volume
66
Issue
No. 1

Keywords

bromination, YBCO

Citation

Dieng, L. , Tyson, T. , Croft, M. , Dogan, T. , Kim, C. , Woicik, J. , Grow, J. and Ignatov, A. (2002), Observation of Changes in the Atomic and Electronic Structure of Single-Crystal Yba<sub>2</sub>Cu<sub>3</sub>O<sub>6.6</sub> Accompanying Bromination, Physical Review B (Condensed Matter and Materials Physics) (Accessed April 21, 2024)
Created June 30, 2002, Updated October 12, 2021