Stripe structure and non-homogeneity of the CuO2 plane by joint EXAFS and diffraction

Local structure of the CuO2 plane in Bi2Sr2CaCu2O8+δ (Bi2212) superconductor has been solved by joint Cu K-edge extended X-ray absorption fine structure (EXAFS) and anomalous X-ray diffraction. The Cu-O pair distribution function (PDF) has been measured by EXAFS and diffraction. The displacement of...

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Détails bibliographiques
Auteurs principaux: Bianconi, A, Saini, N, Lanzara, A, Lusignoli, M, Rossetti, T, Radaelli, P, Bordet, P, Kvick, Å, Oyanagi, H
Format: Journal article
Langue:English
Publié: 1997
Description
Résumé:Local structure of the CuO2 plane in Bi2Sr2CaCu2O8+δ (Bi2212) superconductor has been solved by joint Cu K-edge extended X-ray absorption fine structure (EXAFS) and anomalous X-ray diffraction. The Cu-O pair distribution function (PDF) has been measured by EXAFS and diffraction. The displacement of the Cu ions along the c-axis shows largest amplitude and anharmonic character. The results show flat stripes of the CuO2 lattice of width L = 15 ± 0.5 Å that are separated by stripes of bent CuO2 plane. The modulation of the CuO2 plane measured by EXAFS and anomalous diffraction has been discussed.