Asymmetric local displacements in the Bi2Sr2CaCu2O8+β superconductor
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.
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