Following spin fluctuations in La2-xSrxCuO4 across Tc and T*

ORAL

Abstract

Understanding the evolution of magnetic correlations across the pseudogap as a function of temperature and chemical substitution in cuprates constitutes an important challenge. Inelastic neutron scattering is the natural technique for such studies, and recent improvements in capabilities allow for an enhanced ability to distinguish spin fluctuations from phonons. To this end, we have studied large single-crystal samples of La2-xSrxCuO4 with x=0.17 and 0.21, bracketing the critical concentration xc~0.19, on the time-of-flight spectrometer SEQUOIA at the SNS. Measurements were done in the rotating-crystal mode, providing four-dimensional data in the energy-momentum phase space, and at temperatures well below Tc, above Tc, and at 300 K. The results of a detailed analysis will be presented.

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Presenters

  • Yangmu Li

    Brookhaven National Laboratory, School of Physics and Astronomy, University of Minnesota

Authors

  • Yangmu Li

    Brookhaven National Laboratory, School of Physics and Astronomy, University of Minnesota

  • Ruidan Zhong

    Brookhaven National Laboratory, Brookhaven National Labs, Brookhaven Natl Lab, Brookhaven National Lab, Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory

  • Genda Gu

    Brookhaven National Laboratory, Brookhaven National Labs, Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Condensed Matter Physics and Material Science Department, Brookhaven National Laboratory, Condensed Matter &materials Science, Brookhaven Natl Lab, Brookhaven Natl Lab, Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Brookhaven Natl. Lab, Brookhaven National Lab, Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, brookhaven national laboratory

  • John Tranquada

    Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Condensed Matter Physics and Material Science Department, Brookhaven National Laboratory, Brookhaven National Laboratory, Condensed Matter &materials Science, Brookhaven Natl Lab, Brookhaven Natl Lab, Brookhaven Natl. Lab

  • Igor Zaliznyak

    Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Brookhaven National Laboratory, Brookhaven Natl Lab

  • Matthew Stone

    Oak Ridge National Laboratory, Oak Ridge National Lab, Oak Ridge National Laborator, Neutron scattering devision, Oak Ridge National Lab

  • Alexander Kolesnikov

    Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge National Lab, Oak Ridge National Laboratory