High field, low temperature 17O Knight shift in an underdoped High-Tc cuprate: La(2-x)Sr(x)CuO(4) for x =0.115, 0.15

ORAL

Abstract

We use high magnetic fields ($>$30T) to suppress the superconducting Tc in order to investigate the normal state NMR properties of La(2-x)Sr(x)CuO(4) (LSCO) at low temperatures. Recent studies have shown glassy behavior and incommensurate spin-waves in LSCO, which has been discussed as evidencing a stripe ordered picture at low temperatures in the under-doped regime. We use 17O NMR as a local probe of the electron density on the planar oxygens. 17O Knight shift and linewidth were obtained over a wide temperature range in the normal state for under-doped (x=0.115) and optimally doped (x=0.15) LSCO.

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Authors

  • Greg Boebinger

    National High Magnetic Field Laboratory 32310, National High Magnetic Field Lab, National High Magnetic Field Laboratory and Florida State University, MagLab/FSU

  • Robert Smith

    National High Magnetic Field Laboratory 32310, National High Magnetic Field Lab

  • Phillip Kuhns

    National High Magnetic Field Laboratory, National High Magnetic Field Laboratory 32310, Department of Physics and National High Magnetic Field Laboratory, Florida State University, National High Magnetic Field Lab

  • Arneil Reyes

    National High Magnetic Field Laboratory, National High Magnetic Field Laboratory 32310, Department of Physics and National High Magnetic Field Laboratory, Florida State University, National High Magnetic Field Lab

  • Takashi Imai

    Dept. of Physics, McMaster University, Canada, McMaster University