2003/12/24 by Z. Islam, Zahirul Islam, X. Liu +11 · 1 citation
Chemistry · Mathematics · Physics and Astronomy · #Anisotropy #Chemistry #Condensed matter physics #Crystallography #Diffraction #Doping #Energy (signal processing) #Magnetic properties of thin films #Materials science #Mathematics #Optics #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Superconductivity #Superconductivity in MgB2 and Alloys #Superlattice #Superstructure #Thermodynamics #Unit (ring theory) #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.93.157008
Corrected typo in abstract
arxiv created 2003/12/24 · openalex publication_date 2004/10/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Diffuse x-ray scattering measurements reveal that the optimally doped YBa2Cu3O6.92 superconductor is intrinsically modulated due to the formation of a kinetically limited 4-unit-cell superlattice, q(0)=(1/4, 0, 0), along the shorter Cu-Cu bonds. The superlattice consists of large anisotropic displacements of Cu, Ba, and O atoms, respectively, which are correlated over approximately 3-6 unit cells in the ab plane, and appears to be consistent with the presence of an O-ordered "ortho-IV" phase. Long-range strains emanating from these modulated regions generate an inhomogeneous lattice which may play a fundamentally important role in the electronic properties of yttrium-barium-copper-oxides.