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Asymmetric local displacements in the Bi2Sr2CaCu2O8+β superconductor

  • N.L. Saini
  • A. Lanzara
  • A. Bianconi
  • H. Oyanagi

Abstract:

Instantaneous in-plane Cu-O bond distribution in the Bi2Sr2CaCu2O8+β (Bi2212) superconductor has been investigated by high k-resolution Cu K-edge extended X-ray absorption fine structure (EXAFS) measured with polarized vector parallel to the two orthogonal Cu-O-Cu bonds of the CuO2 square plane. The results show an anisotropic Cu-O distribution in the two directions and provide further information on the local atomic displacements in the lattice-charge stripes.

PACS. 74.72.Hs Bi-based cuprates - 61.10.Ht X-ray absorption spectroscopy: EXAFS, NEXAFS, XANES, etc. - 74.80.-g Spatially inhomogeneous structures 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2000

Authors and Affiliations

  • N.L. Saini
    • 1
  • A. Lanzara
    • 1
  • A. Bianconi
    • 1
  • H. Oyanagi
    • 2
  1. 1.Unita' INFM and Dipartimento di Fisica, Università di Roma “La Sapienza", P.A. Moro 2, 00185 Roma, ItalyIT
  2. 2.Electrotechnical Laboratory, Umezono, Tsukuba, Ibaraki 305 Tsukuba, JapanJP

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