Spatial inhomogeneity and planar symmetry breaking of the lattice incommensurate supermodulation in the high-temperature superconductor Bi2Sr2CaCu2O8+y

Article

关键词: WIGNER POLARON CRYSTAL;    CUO2 PLANE;    STRIPE STRUCTURE;    SINGLE-CRYSTALS;    CRITICAL-POINT;    PSEUDOGAP;    PHASE;    SUPERLATTICE;    DISPLACEMENTS;    AMPLIFICATION;   

DOI  :  10.1103/PhysRevB.84.100504

来源: SCIE

【 摘 要 】

Using scanning micro-x-ray diffraction we report a mixed real and reciprocal space visualization of the spatial heterogeneity of the lattice incommensurate supermodulation in a single crystal of Bi2Sr2CaCu2O8+y with T-c = 84 K. The mapping shows an amplitude distribution of the supermodulation with large lattice fluctuations at a microscale with similar to 50% amplitude variation. The angular distribution of the supermodulation amplitude in the a-b plane shows a lattice chiral symmetry, forming a left-handed oriented striped pattern. The spatial correlation of the supermodulation is well described by a compressed exponential with an exponent of 1.5 +/- 0.3 and a correlation length of similar to 50 mu m, showing intrinsic lattice disorder in high-temperature superconductors.

【 授权许可】

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