title: Orbital symmetry of charge-density-wave order in La1.875Ba0.125CuO4 and YBa2Cu3O6.67.
abstract: Recent theories of charge-density-wave (CDW) order in high-temperature superconductors have predicted a primarily d CDW orbital symmetry. Here, we report on the orbital symmetry of CDW order in the canonical cuprate superconductors La1.875Ba0.125CuO4 (LBCO) and YBa2Cu3O6.67 (YBCO), using resonant soft X-ray scattering and a model mapped to the CDW orbital symmetry. From measurements sensitive to the O sublattice, we conclude that LBCO has predominantly s' CDW orbital symmetry, in contrast to the d orbital symmetry recently reported in other cuprates. Furthermore, we show for YBCO that the CDW orbital symmetry differs along the a and b crystal axes and that these both differ from LBCO. This work highlights CDW orbital symmetry as an additional key property that distinguishes the different cuprate families. We discuss how the CDW symmetry may be related to the '1/8-anomaly' and to static spin ordering.
authors.affiliation: Department of Physics and Astronomy, University of Waterloo, Waterloo N2L 3G1, Canada.
authors.forename: A J
authors.initials: AJ
authors.lastname: Achkar
authors.affiliation: Canadian Light Source, Saskatoon, Saskatchewan S7N 2V3, Canada.
authors.forename: F
authors.identifier: 0000-0002-3125-1406
authors.initials: F
authors.lastname: He
authors.affiliation: Canadian Light Source, Saskatoon, Saskatchewan S7N 2V3, Canada.
authors.forename: R
authors.identifier: 0000-0002-1969-3690
authors.initials: R
authors.lastname: Sutarto
authors.affiliation: Department of Physics and Astronomy, University of Waterloo, Waterloo N2L 3G1, Canada.
authors.forename: Christopher
authors.initials: C
authors.lastname: McMahon
authors.affiliation: Leibniz Institute for Solid State and Materials Research IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Zwiebler
authors.affiliation: Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: M
authors.initials: M
authors.lastname: Hücker
authors.affiliation: Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: G D
authors.initials: GD
authors.lastname: Gu
authors.affiliation: Department of Physics and Astronomy, University of British Columbia, Vancouver V6T 1Z1, Canada.|Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada.
authors.forename: Ruixing
authors.initials: R
authors.lastname: Liang
authors.affiliation: Department of Physics and Astronomy, University of British Columbia, Vancouver V6T 1Z1, Canada.|Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada.
authors.forename: D A
authors.initials: DA
authors.lastname: Bonn
authors.affiliation: Department of Physics and Astronomy, University of British Columbia, Vancouver V6T 1Z1, Canada.|Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada.
authors.forename: W N
authors.initials: WN
authors.lastname: Hardy
authors.affiliation: Chemistry and Physics of Materials, Paris Lodron University Salzburg, Hellbrunner Strasse 34, 5020 Salzburg, Austria.
authors.forename: J
authors.initials: J
authors.lastname: Geck
authors.affiliation: Department of Physics and Astronomy, University of Waterloo, Waterloo N2L 3G1, Canada.|Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada.
authors.forename: D G
authors.initials: DG
authors.lastname: Hawthorn