We have performed extended x-ray-absorption fine-structure (EXAFS) measurements to study the local atomic structure of the HgBa2CuO4+delta (Hg-1201) system across the superconducting transition temperature (T-c). The Debye-Waller factors of atomic pairs obtained by Cu K-edge EXAFS are compared with diffraction data to calculate atomic correlations. The atomic correlations for Cu-O bonds show anomalous temperature dependences across the T-c, highlighting the important role of electron-lattice interactions to derive the superconducting characteristics of the system.
Anomalous local atomic correlations in HgBa2CuO4+d / A., Lanzara; Saini, Naurang Lal; Bianconi, Antonio; F., Duc; P., Bordet. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 59:(1999), pp. 3851-3854. [10.1103/PhysRevB.59.3851]
Anomalous local atomic correlations in HgBa2CuO4+d
SAINI, Naurang Lal;BIANCONI, Antonio;
1999
Abstract
We have performed extended x-ray-absorption fine-structure (EXAFS) measurements to study the local atomic structure of the HgBa2CuO4+delta (Hg-1201) system across the superconducting transition temperature (T-c). The Debye-Waller factors of atomic pairs obtained by Cu K-edge EXAFS are compared with diffraction data to calculate atomic correlations. The atomic correlations for Cu-O bonds show anomalous temperature dependences across the T-c, highlighting the important role of electron-lattice interactions to derive the superconducting characteristics of the system.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
