title: Angular fluctuations of a multicomponent order describe the pseudogap of YBa2Cu3O(6+x).
abstract: The hole-doped cuprate high-temperature superconductors enter the pseudogap regime as their superconducting critical temperature, Tc, falls with decreasing hole density. Recent x-ray scattering experiments in YBa2Cu3O(6+x) observe incommensurate charge-density wave fluctuations whose strength rises gradually over a wide temperature range above Tc, but then decreases as the temperature is lowered below Tc. We propose a theory in which the superconducting and charge-density wave orders exhibit angular fluctuations in a six-dimensional space. The theory provides a natural quantitative fit to the x-ray data and can be a basis for understanding other characteristics of the pseudogap.
authors.affiliation: Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
authors.forename: Lauren E
authors.initials: LE
authors.lastname: Hayward
authors.forename: David G
authors.initials: DG
authors.lastname: Hawthorn
authors.forename: Roger G
authors.initials: RG
authors.lastname: Melko
authors.forename: Subir
authors.initials: S
authors.lastname: Sachdev