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

• Main Authors: McMahon, Christopher (Author), Achkar, AJ (Author), da Silva Neto, EH (Author), Djianto, I (Author), Menard, J (Author), He, F (Author), Sutarto, R (Author), Comin, R (Author), Liang, Ruixing (Author), Bonn, DA (Author), Hardy, WN (Author), Damascelli, A (Author), Hawthorn, DG (Author)
• Format: Article
• Language: English
• Published: American Association for the Advancement of Science (AAAS), 2022-04-01T12:42:34Z.
• Subjects: Article
• Online Access: Get fulltext

 Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). Charge density wave (CDW) order has been shown to compete and coexist with superconductivity in underdoped cuprates. Theoretical proposals for the CDW order include an unconventional d-symmetry form factor CDW, evidence for which has emerged from measurements, including resonant soft x-ray scattering (RSXS) in YBa2Cu3O6+x (YBCO). Here, we revisit RSXS measurements of the CDW symmetry in YBCO, using a variation in the measurement geometry to provide enhanced sensitivity to orbital symmetry. We show that the (0 0.31 L) CDW peak measured at the Cu L edge is dominated by an s form factor rather than a d form factor as was reported previously. In addition, by measuring both (0.31 0 L) and (0 0.31 L) peaks, we identify a pronounced difference in the orbital symmetry of the CDW order along the a and b axes, with the CDW along the a axis exhibiting orbital order in addition to charge order.