Study of Cu-O and Cu-La Pair Correlations in Superconducting La2CuO4.1 System by Cu K-Edge EXAFS
Journal
Journal of the Physical Society of Japan
Journal Volume
67
Journal Issue
1
Pages
16-19
Date Issued
1998
Author(s)
Abstract
We report Cu K-edge extended X-ray absorption fine structure (EXAFS) spectra up to high momentum transfer measured on a superconducting La2CuO4.1 single crystal using in-plane polarization of synchrotron light. The EXAFS data with a high signal to noise ratio has enabled the precise determination of the Debye-Waller factors and the pair correlations of Cu-O (planar) and Cu-La pairs of the structurally complex superconducting system. We have observed an anomalous behaviour of the pair correlations at similar to 170 K and attributed it to an interplay between temperature-dependent structural modulation of the perovskite and rock-salt layers in the title compound.
Publisher
Physical Society of Japan
Type
journal article