Probing electronic order via coupling to phonons in Bi2Sr2CuO6 (Bi2201)

ORAL

Abstract

Recent work on several members of the cuprate family of high-temperature superconductors has revealed the occurrence of broken lattice translational, rotational, and time reversal symmetries in various materials at low temperatures. We report on measurements of acoustic phonons on Bi$_2$(La,Sr)$_2$CuO$_{6+\delta}$, which reveal a coupling to an underlying electronic density-wave state. Longitudinal acoustic phonons are found to be anomalously broadened at a wavevector of q $\approx$ 1/4 rlu along the Cu-O direction. At low temperatures a disparity between the scattered intensity at positive and negative energy transfer is seen. These measurements indicates a breaking of time reversal and inversion symmetry in the bulk.

*This work was supported by the US Department of Energy under Grant No. DE-FG02-07ER46134

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Authors

  • Craig Bonnoit

    • Massachusetts Institute of Technology

  • Dillon Gardner

    • Massachusetts Institute of Technology

  • Robin Chisnell

    • Massachusetts Institute of Technology
    • MIT

  • Ayman Said

    • Advanced Photon Source, Argonne National Laboratory

  • Yoshi Okada

    • Boston College
    • Nagoya University

  • Takeshi Kondo

    • University of Tokyo

  • Tsunehiro Takeuchi

    • Nagoya University

  • Hiroshi Ikuta

    • Nagoya University

  • David Moncton

    • Massachusetts Institute of Technology

  • Young Lee

    • MIT
    • Massachusetts Institute of Technology