The temperature-dependent pair distribution function of the in plane Cu-O pairs has been determined by in plane polarized (E parallel to ab) Cu K-edge extended X-ray absorption fine structure (EXAFS) experiments on single crystal of La1.85Sr0.15CuO4 (LSCO) with T-c=35 K. A splitting of the Cu-O (planar) distance larger than the correlated Debye-Waller factor appears for T<100 K. The separation between the two distances decreases at T-c but increases again in the superconducting state (T<T-c), The comparison with diffraction data probing the uncorrelated Debye-Waller factors is discussed.
Temperature dependent Cu-O distribution function of the superconducting CuO2 plane / Saini, N.L., A., L., Bianconi, A., H., O., Oka, H.Y.A.M.A.G.U.C.H.I.K., T., I.. - In: PHYSICA. C, SUPERCONDUCTIVITY. - ISSN 0921-4534. - 268:(1996), pp. 121-127. [10.1016/0921-4534(96)00403-0]
Temperature dependent Cu-O distribution function of the superconducting CuO2 plane
SAINI, Naurang Lal;BIANCONI, Antonio;
1996
Abstract
The temperature-dependent pair distribution function of the in plane Cu-O pairs has been determined by in plane polarized (E parallel to ab) Cu K-edge extended X-ray absorption fine structure (EXAFS) experiments on single crystal of La1.85Sr0.15CuO4 (LSCO) with T-c=35 K. A splitting of the Cu-O (planar) distance larger than the correlated Debye-Waller factor appears for T<100 K. The separation between the two distances decreases at T-c but increases again in the superconducting state (TI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
