We report Cu K-edge extended X-ray absorption fine structure (EXAFS) spectra up to high momentum transfer measured on a superconducting La2CuO4.1 single crystal using in-plane polarization of synchrotron light. The EXAFS data with a high signal to noise ratio has enabled the precise determination of the Debye-Waller factors and the pair correlations of Cu-O (planar) and Cu-La pairs of the structurally complex superconducting system. We have observed an anomalous behaviour of the pair correlations at similar to 170 K and attributed it to an interplay between temperature-dependent structural modulation of the perovskite and rock-salt layers in the title compound.
Study of Cu-O and Cu-La pair correlations in superconducting La2CuO4.1 system by Cu K-edge EXAFS / Saini, Naurang Lal; A., Lanzara; Bianconi, Antonio; F., Chou; D. C., Johnston. - In: JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN. - ISSN 0031-9015. - 67:(1998), pp. 16-19. [10.1143/JPSJ.67.16]
Study of Cu-O and Cu-La pair correlations in superconducting La2CuO4.1 system by Cu K-edge EXAFS
SAINI, Naurang Lal;BIANCONI, Antonio;
1998
Abstract
We report Cu K-edge extended X-ray absorption fine structure (EXAFS) spectra up to high momentum transfer measured on a superconducting La2CuO4.1 single crystal using in-plane polarization of synchrotron light. The EXAFS data with a high signal to noise ratio has enabled the precise determination of the Debye-Waller factors and the pair correlations of Cu-O (planar) and Cu-La pairs of the structurally complex superconducting system. We have observed an anomalous behaviour of the pair correlations at similar to 170 K and attributed it to an interplay between temperature-dependent structural modulation of the perovskite and rock-salt layers in the title compound.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.