Orbital symmetries of charge density wave order in YBa<sub>2</sub>Cu<sub>3</sub>O<sub>6+x</sub>

ORAL

Abstract

Charge density wave (CDW) order has been shown to compete and co-exist with superconduc- tivity in underdoped cuprate superconductors. Moreover, the CDW order has been proposed to exhibit a novel d-symmetry form factor—a quadrupolar modulation of the charge on oxygen sites surrounding each Cu site — evidence for which has emerged from STM measurements in BSCCO, NCCOC and from resonant x-ray scattering measurements of YBa2Cu3O6+x (YBCO). Here, we revisit resonant x-ray scattering measurements at the Cu L edge of the CDW form factor in YBCO, utilizing a variation in the measurement geometry to provide enhanced sensitivity to the CDW orbital symmetry. Contrary to previous reports, the (0 0.31 L) peak measured at the Cu L edge is dominated by a simple s form factor, revealing no evidence for a dominant d form factor CDW. However, by measuring the CDW orbital symmetry at both the (0.31 0 L) and (0 0.31 L) peaks, we identify a pronounced difference in the orbital symmetry of the CDW order propagating along the a and b axes, with the CDW propagating along the a-axis exhibiting some form of orbital order in addition to charge order. Model calculations indicate that a candidate for the unusual orbital symmetry of the a-axis CDW to break ac and ab plane mirror symmetries.

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Presenters

  • David G Hawthorn

    • Department of Physics and Astronomy, University of Waterloo
    • Physics and Astronomy, University of Waterloo

Authors

  • Christopher M McMahon

    • Physics and Astronomy, University of Waterloo

  • Andrew Achkar

    • Physics and Astronomy, University of Waterloo

  • Eduardo H Da Silva Neto

    • Physics, Univ of California - Davis
    • Stuart Blussom Quantum Matter Institute, University of British Columbia
    • University of California, Davis
    • Department of Physics, University of California Davis

  • Isaiah Djianto

    • Physics and Astronomy, University of Waterloo

  • Jyler Menard

    • Physics and Astronomy, University of Waterloo

  • Feizhou He

    • Canadian Light Source

  • Ronny Sutarto

    • Canadian Light Source

  • Riccardo Comin

    • Massachusetts Institute of Technology
    • Massachusetts Institute of Technology, Department of Physics
    • Department of Physics, Massachusetts Institute of Technology
    • Stuart Blussom Quantum Matter Institute, University of British Columbia

  • Ruixing Liang

    • Stuart Blussom Quantum Matter Institute, University of British Columbia
    • University of British Columbia
    • Univ of British Columbia

  • Douglas Andrew Bonn

    • University of British Columbia
    • Stuart Blussom Quantum Matter Institute, University of British Columbia
    • Univ of British Columbia

  • Walter N Hardy

    • Stuart Blussom Quantum Matter Institute, University of British Columbia
    • Univ of British Columbia

  • Andrea Damascelli

    • University of British Columbia
    • University of British Colombia
    • QMI, University of British Columbia
    • Physics and Astronomy, University of British Columbia
    • Stuart Blussom Quantum Matter Institute, University of British Columbia
    • Quantum Matter Institute, University of British Columbia
    • Department of Physics & Astronomy, University of British Columbia

  • David G Hawthorn

    • Department of Physics and Astronomy, University of Waterloo
    • Physics and Astronomy, University of Waterloo