Evidence for Dissipative Glauber Dynamics in the Charge Ordered Phase of La<sub>1.875</sub>Ba<sub>0.125</sub>CuO<sub>4</sub> studied with an X-ray Free-Electron Laser

ORAL

Abstract

Charge order (CO) is a ubiquitous feature of the phase diagrams of all the cuprate superconductor families that usually anticorrelates with superconductivity (SC). Despite recent studies of the structure of charge-order in the cuprates, little is known about its collective modes. Here, we investigate the collective dynamics of CO in La1.875Ba0.125CuO4. By suddenly quenching the CO peak with an optical pulse and probing it with ultrafast X-rays at the LCLS free-electron laser, we find no evident signatures of coherent collective modes, at variance with other CO systems. Instead, we observe a surprising momentum-dependent relaxation time that implies a purely dissipative Glauber dynamics of CO. Our work suggests that the CO phase is strongly coupled to an incoherent continuum of states implying highly unconventional fluctuation dynamics of CO in cuprate superconductors.

*This study was supported by the DOE Office of Science under award no. DE-FG02-06ER46285. Use of the LCLS is supported by the U.S. DOE-BES under Contract No. DE-AC02-76SF00515.

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Presenters

  • Matteo Mitrano

    • Univ of Illinois - Urbana
    • Physics/MRL, Univ of Illinois - Urbana
    • Department of Physics and Materials Research Laboratory, University of Illinois

Authors

  • Matteo Mitrano

    • Univ of Illinois - Urbana
    • Physics/MRL, Univ of Illinois - Urbana
    • Department of Physics and Materials Research Laboratory, University of Illinois

  • Sangjun Lee

    • Physics/MRL, Univ of Illinois - Urbana
    • Univ of Illinois - Urbana
    • Department of Physics, University of Illinois

  • Ali Husain

    • Univ of Illinois - Urbana
    • Physics/MRL, Univ of Illinois - Urbana
    • Department of Physics and Materials Research Laboratory, University of Illinois

  • Gilberto De La Pena

    • Physics/MRL, Univ of Illinois - Urbana
    • Univ of Illinois - Urbana
    • Department of Physics, University of Illinois

  • Young Joe

    • NIST
    • National Institute of Standards and Technology

  • Alexander Reid

    • SLAC National Accelerator Laboratory

  • Tim van Driel

    • SLAC National Accelerator Laboratory

  • Scott Wandel

    • SLAC National Accelerator Laboratory

  • Giacomo Coslovich

    • SLAC National Accelerator Laboratory

  • John Schneeloch

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

  • 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

  • Peter Abbamonte

    • University of Illinois
    • Univ of Illinois - Urbana
    • Physics/MRL, Univ of Illinois - Urbana
    • Department of Physics, University of Illinois
    • Department of Physics and Materials Research Laboratory, University of Illinois