X-Ray Diffraction Observations of a Charge-Density-Wave Order in Superconducting Ortho-II YBa_{2}Cu_{3}O_{6.54} Single Crystals in Zero Magnetic Field

Blackburn, E.Chang, Johan JuulHücker, M.Holmes, A. T.Christensen, N. B.Liang, RuixingBonn, D. A.Hardy, W. N.Rütt, U.Gutowski, O.Zimmermann, M. V.Forgan, E. M.Hayden, S. M.2013-03-312013-03-312013-03-31201310.1103/PhysRevLett.110.137004https://infoscience.epfl.ch/handle/20.500.14299/91243WOS:000316800000019X-ray diffraction measurements show that the high-temperature superconductor YBa2Cu3O6.54, with ortho-II oxygen order, has charge-density-wave order in the absence of an applied magnetic field. The dominant wave vector of the charge density wave is q(CDW) = (0, 0.328(2), 0.5), with the in-plane component parallel to the b axis (chain direction). It has a similar incommensurability to that observed in ortho-VIII and ortho-III samples, which have different dopings and oxygen orderings. Our results for ortho-II contrast with recent high-field NMR measurements, which suggest a commensurate wave vector along the a axis. We discuss the relationship between spin and charge correlations in YBa2Cu3Oy and recent high-field quantum oscillation, NMR, and ultrasound experiments. DOI: 10.1103/PhysRevLett.110.137004X-Ray Diffraction Observations of a Charge-Density-Wave Order in Superconducting Ortho-II YBa_{2}Cu_{3}O_{6.54} Single Crystals in Zero Magnetic Fieldtext::journal::journal article::research article