Ultrafast probing of collective mode of the charge order in La<sub>1.875</sub>Ba<sub>0.125</sub>CuO<sub>4 </sub>

ORAL

Abstract

The phase diagram of cuprate superconductors exhibits a plethora of intertwined orders, such as pseudogap, charge order and pair density wave. In particular, many cuprate families display a charge order near the 1/8 doping that coexist with superconductivity. Recent scattering studies have demonstrated that suppressing the superconductivity can increase the strength of coexisting charge order. However, little is known about the collective modes of the charge order and its interaction with other phases. Here, we perform time resolved transient reflectivity measurements on La1.875Ba0.125CuO4 (LBCO) and La1.885Ba0.115CuO4 (LBCO). We find a short-lived oscillatory signal, which turns on near the charge ordering temperature consistent with the amplitude mode of the charge order. We will comment on the implications of these measurements on the coupling between two dimensional superconductivity and stripe phase in LBCO.

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Presenters

  • Emre Ergecen

    • Physics, Massachusetts Institute of Technology
    • Department of Physics, Massachusetts Institute of Technology
    • Massachusetts Institute of Technology

Authors

  • Emre Ergecen

    • Physics, Massachusetts Institute of Technology
    • Department of Physics, Massachusetts Institute of Technology
    • Massachusetts Institute of Technology

  • Mehmet B Yilmaz

    • Massachusetts Institute of Technology

  • Batyr Ilyas

    • Massachusetts Institute of Technology

  • Genda Gu

    • Brookhaven National Laboratory
    • Brookhaven National Lab
    • Department of Condensed Matter Physics and Materials Science, Brookhaven, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
    • Cond. Matt. Physics and Material Science, Brookhaven Natl Lab
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory
    • Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory
    • Brookhaven National Labs, Long Island, NY, USA, 11973
    • Condensed Matter Physics & Materials Science, Brookhaven National Laboratory
    • Condensed Matter Physics, Brookhaven National Laboratory
    • Brookhaven National Laboratories
    • Chinese Academy of Sciences
    • Condensed Matter Physics & Materials Science, Brookhaven National Lab
    • Brookhaven Natl Lab

  • Nuh Gedik

    • Physics, Massachusetts Institute of Technology
    • Massachusetts Inst of Tech-MIT
    • Massachusetts Institute of Technology
    • Department of Physics, Massachusetts Institute of Technology