Orbital symmetries of charge density wave order in YBa2Cu3O6+x

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