Structural Changes Accompanying Bromination and Chlorination of Underdoped Single-Crystal Ybco: Recovery of Superconductivity

Abstract

To understand the role of bromination in the recovery of superconductivity in underdoped YBCO, the spatially resolved local structural changes in brominated and chlorinated single crystals have been measured and compared to those in normal crystals. The local structure about the Y, Ba, Cu and Br/Cl sites was determined. A comparison with normal YBCO crystals with a range of oxygen content was performed. While the high energy XAFS yielded local structural information, evidence for charge transfer was derived from the near edge spectra. We address the issue of the incorporation of Br/Cl into the lattice and develop structural models for the recovery of superconductivity in each case.

Department(s)

Materials Science and Engineering

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2026 American Physical Society, All rights reserved

Publication Date

2001-03-01

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