Photo-enhanced metastable c-axis transport in stripe ordered cuprate La<sub>1.885</sub>Ba<sub>0.115</sub>CuO<sub>4</sub>

ORAL

Abstract

Numerous cuprate-based superconductors exhibit a complex interplay between spin order, charge order and superconductivity. Light-matter interaction can provide alternate pathways to initiate phase transitions via non-linear drive or by readjusting the energy landscape between competing order parameters. THz time domain spectroscopy is performed on stripe ordered La2-xBaxCuO4 (x = 0.115) to monitor the c-axis Josephson Plasma Resonance (JPR), which acts a direct probe of the superconducting dynamics following near-infrared excitation. After photo-excitation of the superconducting state with 1.55 eV pulses, we observe the emergence of a new long lived metastable state which displays a blue shifted plasma edge. This new phase is suggestive of enhanced c-axis transport not observed in equilibrium and has implications for superconducting fluctuations appearing above Tc in the charge ordered state. We also investigate the mechanism for how the electronic transition at 1.55 eV couples to c-axis vibrational modes which may aid in the superconducting fluctuations above Tc.

*Research supported by DOE-BES under DE-SC0018218

–

Presenters

  • Kevin Cremin

    • University of California, San Diego

Authors

  • Kevin Cremin

    • University of California, San Diego

  • Jingdi Zhang

    • Department of Physics, University of California San Diego
    • University of California, San Diego

  • Christopher Homes

    • CMPMS, Brookhaven National Laboratory, Upton, New York, USA
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory
    • Brookhaven National Laboratory

  • 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

  • Zhiyuan Sun

    • Physics, Columbia University
    • Columbia University
    • Department of Physics, Columbia University

  • Michael Fogler

    • University of California, San Diego
    • Physics, University of California, San Diego
    • University of California San Diego
    • UC San Diego

  • Andrew Millis

    • Center for Computational Quantum Physics, Flatiron Institute
    • Physics, Columbia University
    • Columbia University
    • Department of Physics, Columbia University
    • Center for Computational Quantum Physics, Flatiron Institute, NY, NY, 10010
    • National Institute of Materials Science
    • Center for Computational Quantum Physics, Flatiorn Institute, Physics Department, Columbia University

  • Dimitri N Basov

    • Department of Physics, Columbia University

  • Richard Douglas Averitt

    • UC San Diego
    • University of California, San Diego
    • Department of Physics, University of California San Diego
    • Univ of California - San Diego