Volume 63, Number 1, July 2003
|Page(s)||125 - 131|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 June 2003|
Different temperature-dependent local displacements in the underdoped and overdoped system
Unità INFM, Università di Roma “La Sapienza” P. le Aldo Moro 2, 00185 Roma, Italy
2 National Institute for Advanced Industrial Science and Technology 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
Accepted: 30 April 2003
K-edge extended X-ray absorption fine-structure (EXAFS) measurements have been used to study the temperature-dependent local structure of the underdoped and overdoped superconducting x system. The Debye-Waller factor of the in-plane - bonds has been used as an order parameter to measure the local displacements, revealing an anomalous behavior for the underdoped case while the overdoped system shows a negligible change as a function of temperature. The results provide an evidence for a close relationship between local - displacements, electron-lattice interaction and charge inhomogeneity in the copper oxide superconductors.
PACS: 74.72.Dn – La-based cuprates / 74.80.-g – Spatially inhomogeneous structures / 61.10.Ht – X-ray absorption spectroscopy: EXAFS, NEXAFS, XANES, etc
© EDP Sciences, 2003
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.