TEMPERATURE-DEPENDENT LOCAL-STRUCTURE OF THE CUO2 PLANE IN THE 1 8 DOPED LA1.875BA0.125CUO4 SYSTEM/

Authors
LANZARA A SAINI NL ROSSETTI T BIANCONI A OYANAGI H YAMAGUCHI H MAENO Y
Citation
A. Lanzara et al., TEMPERATURE-DEPENDENT LOCAL-STRUCTURE OF THE CUO2 PLANE IN THE 1 8 DOPED LA1.875BA0.125CUO4 SYSTEM/, Solid state communications, 97(2), 1996, pp. 93-96
Citations number
30
Categorie Soggetti
Physics, Condensed Matter
Journal title
Solid state communications → ACNP
ISSN journal
00381098
Volume
97
Issue
2
Year of publication
1996
Pages
93 - 96
Database
ISI
SICI code
0038-1098(1996)97:2<93:TLOTCP>2.0.ZU;2-I
Abstract
Local structure of the Cu site in the 1/8 doped insulating La1.875Ba0. 125CuO4 system has been studied by Cu K-edge extended x-ray absorption spectra (EXAFS). The correlated Debye-Waller factor of the Cu-O(plana r) pairs shows an anomalous increase below similar to 70K indicating s tructural fluctuations in the CuO2 lattice. The results are in agreeme nt with the recent diffraction studies showing 70K as an onset tempera ture for a superstructure peak due to charge modulation in the system, below the transition from average low temperature orthorhombic (LTO) to average low temperature tetragonal (LTT) structure.