Stripe structure of the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">CuO</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math> plane in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Bi</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Sr</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">CaCu</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">O</mi></mrow><mrow><mn>8</mn><mo>+</mo><mi mathvariant="italic">y</mi></mrow></msub></mrow></math> by anomalous x-ray diffraction

A. Bianconi; M. Lusignoli; N. L. Saini; P. Bordet; Å. Kvick; P. G. Radaelli

doi:10.1103/PhysRevB.54.4310

Stripe structure of the ${CuO}_{2}$ plane in ${Bi}_{2}$ ${Sr}_{2}$ ${CaCu}_{2}$ $O_{8 + y}$ by anomalous x-ray diffraction

A. Bianconi, M. Lusignoli, N. L. Saini, P. Bordet, Å. Kvick, and P. G. Radaelli

Phys. Rev. B 54, 4310 – Published 1 August 1996

Abstract

The modulated structure of the ${CuO}_{2}$ plane in ${Bi}_{2}$ ${Sr}_{2}$ ${CaCu}_{2}$ $O_{8 + y}$ superconductor has been solved by Cu K-edge anomalous x-ray diffraction. The displacement of Cu ions along the c axis shows the largest amplitude and anharmonic character. The results show flat stripes of ${CuO}_{2}$ lattice of width L=15.5 Å with long Cu-Bi distances that are separated by stripes of bent ${CuO}_{2}$ plane and shorter Cu-Bi distances. In each ${CuO}_{2}$ bilayer the flat stripes in a first layer are close to the bent stripes in the second layer, suppressing the electronic coupling between the two adjacent planes. © 1996 The American Physical Society.