Interstitial Oxygen Dopant Dynamics in La<sub>2</sub>CuO<sub>4+y</sub> Probed by Coherent X-rays

ORAL

Abstract

Oxygen doping La2CuO4 (LCO) yields the superconductor La2CuO4+y with the highest Tc in the LCO family. The interstitial oxygen dopants are mobile and can be annealed to form an ordered lattice, manifested as a satellite Bragg peak in x-ray diffraction. We present x-ray photon correlation spectroscopy (XPCS) data, measuring the dynamic timescale of the corresponding oxygen ordering diffraction peaks in order to infer the interstitial oxygen dopant mobility and its temperature dependence.

*This work was supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division, under contract No. DE-AC02-76SF00515. This research used beamline 11-ID of the National Synchrotron Light Source II, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Laboratory under Contract No. DE-SC0012704.

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Presenters

  • Mingde Jiang

    • Stanford Univ

Authors

  • Mingde Jiang

    • Stanford Univ

  • Wei He

    • Stanford Univ
    • Department of Materials Science and Engineering, Stanford University
    • Department of Applied Physics, Stanford University

  • Jiajia Wen

    • Stanford Univ
    • Department of Applied Physics, Stanford University
    • SLAC - Natl Accelerator Lab

  • Andrei Fluerasu

    • NSLS-II, Brookhaven National Lab
    • National Synchrotron Light Source II
    • National Synchrotron Light Source II, Brookhaven National Laboratory
    • Brookhaven National Laboratory

  • Yugang Zhang

    • NSLS-II, Brookhaven National Lab
    • National Synchrotron Light Source II
    • National Synchrotron Light Source II, Brookhaven National Laboratory
    • Brookhaven National Laboratory

  • Lutz Wiegart

    • NSLS-II, Brookhaven National Lab
    • National Synchrotron Light Source II
    • National Synchrotron Light Source II, Brookhaven National Laboratory
    • Brookhaven National Laboratory

  • Young Sang Lee

    • Stanford Univ
    • Department of Applied Physics, Stanford University
    • Stanford University