Structural Disorder and the Origin of High-Tc Suppression in La₁.₈₇₅Ba₀.₁₂₅ CuO4−δ

Author

• Daniel Haskel
• Edward A. Stern
• Fatih Dogan, Missouri University of Science and TechnologyFollow
• Arnie R. Moodenbaugh

Abstract

Polarized x-ray absorption fine structure (XAFS) measurements at all La, Ba and Cu sites were used to study local structural features that accompany the strong Tc suppression at: r,,, 1/8 in La₂BaCuO₄. Two critical parameters regulating the strength of hole-lattice coupling in this material were determined, ie, the direction and magnitude of CuO₆ octahedra local tilts. Our findings include the existence of large disorder in the magnitude of the tilt angle about its average value (0), with an rms~~ 2 (0). We suggest that this large disorder strongly scatters a large fraction of states at the Fermi surface for x,-,, 1/8 leading to the observed T_c suppression.

Recommended Citation

D. Haskel et al., "Structural Disorder and the Origin of High-Tc Suppression in La₁.₈₇₅Ba₀.₁₂₅ CuO4−δ," Journal of Synchroton Radiation, Wiley-Blackwell, Jan 1999.

The definitive version is available at https://doi.org/10.1107/S0909049599001478

Department(s)

Materials Science and Engineering

Publication Status

Full Access

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2026 Wiley-Blackwell, All rights reserved

Publication Date

1999-01-01