Science · 1988 · 265 citations · 11 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsCrystal StructureSolid State PhysicsStrongly Correlated Electron SystemsSuperconducting MaterialsX-ray DiffractionCuprate SuperconductorsDiffraction Pattern AnalysisDiffraction SymmetryDistortionsSuperconducting PropertiesUnit Cell DeterminationUnit Cell GeometryUnit Cell Parameters
The incommensurate modulation evident in the diffraction pattern of the superconductor Bi(2)Sr3-xCa(x)Cu(2)O8+y consists of almost sinusoidally varying displacements of up to 0.4A of the Bi and Sr atoms in the a-and c-directions of the unit cell, and of up to 0.3 A of the Cu atoms in the c direction only. Thus, a newly discovered feature of the Bi(2)Sr3-xCaxCu(2)O8+y structure is sizable Cu displacement, which is related to static wave formation in the Cu-O sheets. Reported thermal parameters give evidence that similar distortions occur on cooling of the thallium-containing superconductors.
11
Crystal structure of the high-temperature superconductor TI2Ba2CaCu2O8
M.A. Subramanian, J. C. CALABRESE, C.C. Torardi et al. · Nature · 1988 · 431 citations