Long-range two-dimensional superstructure in the superconducting electron-doped cuprate Pr0.88LaCe0.12CuO4

Article

关键词: HIGH-TEMPERATURE SUPERCONDUCTOR;    T-C;    DIFFRACTION PATTERN;    NEUTRON-DIFFRACTION;    SINGLE-CRYSTAL;    X-RAY;    PHASE;    YBA2CU3O6.35;    TRANSITION;    SYMMETRY;   

DOI  :  10.1103/PhysRevB.92.014118

来源: SCIE

【 摘 要 】

Utilizing single-crystal synchrotron x-ray scattering, we observe distorted CuO2 planes in the electron-doped superconductor Pr1-xLaCexCuO4+delta, x = 0.12. Resolution-limited rods of scattering are indicative of a long-range two-dimensional 2 root 2 x 2 root 2 superstructure in the a-b plane, adhering to planar space-group symmetry p4gm, which is subject to stacking disorder perpendicular to the planes. This superstructure is present only in annealed, superconducting samples, but not in the as-grown, nonsuperconducting samples. These long-range distortions of the CuO2 planes, which are generally considered to be detrimental to superconductivity, have avoided detection to date due to the challenges of observing and interpreting subtle diffuse-scattering features.

【 授权许可】

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