Cu 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 La2 − xSrxCuO4 system. The Debye-Waller factor of the in-plane Cu-O 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 Cu-O displacements, electron-lattice interaction and charge inhomogeneity in the copper oxide superconductors.
Different temperature dependent local Cu-O displacements in the underdoped and overdoped regimes of cuprate superconductors / Saini, Naurang Lal; H., Oyanagi. - In: PHYSICA. C, SUPERCONDUCTIVITY. - ISSN 0921-4534. - 412-414:(2004), pp. 152-156. [10.1016/j.physc.2003.12.026]
Different temperature dependent local Cu-O displacements in the underdoped and overdoped regimes of cuprate superconductors
SAINI, Naurang Lal;
2004
Abstract
Cu 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 La2 − xSrxCuO4 system. The Debye-Waller factor of the in-plane Cu-O 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 Cu-O displacements, electron-lattice interaction and charge inhomogeneity in the copper oxide superconductors.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
