title: Kinks, nodal bilayer splitting, and interband scattering in YBa2Cu3O(6+x).
abstract: We apply the new-generation angle-resolved photoemission spectroscopy methodology to the most widely studied cuprate superconductor YBa2Cu3O(6+x). Considering the nodal direction, we found noticeable renormalization effects known as kinks both in the quasiparticle dispersion and scattering rate, the bilayer splitting, and evidence for strong interband scattering--all the characteristic features of the nodal quasiparticles detected earlier in Bi2Sr2CaCu2O(8+delta). The typical energy scale and the doping dependence of the kinks clearly point to their intimate relation with the spin-1 resonance seen in the neutron scattering experiments. Our findings strongly suggest a universality of the electron dynamics in the bilayer superconducting cuprates and a dominating role of the spin fluctuations in the formation of the quasiparticles along the nodal direction.
authors.affiliation: IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany.
authors.forename: S V
authors.initials: SV
authors.lastname: Borisenko
authors.forename: A A
authors.initials: AA
authors.lastname: Kordyuk
authors.forename: V
authors.initials: V
authors.lastname: Zabolotnyy
authors.forename: J
authors.initials: J
authors.lastname: Geck
authors.forename: D
authors.initials: D
authors.lastname: Inosov
authors.forename: A
authors.initials: A
authors.lastname: Koitzsch
authors.forename: J
authors.initials: J
authors.lastname: Fink
authors.forename: M
authors.initials: M
authors.lastname: Knupfer
authors.forename: B
authors.initials: B
authors.lastname: Büchner
authors.forename: V
authors.initials: V
authors.lastname: Hinkov
authors.forename: C T
authors.initials: CT
authors.lastname: Lin
authors.forename: B
authors.initials: B
authors.lastname: Keimer
authors.forename: T
authors.initials: T
authors.lastname: Wolf
authors.forename: S G
authors.initials: SG
authors.lastname: Chiuzbăian
authors.forename: L
authors.initials: L
authors.lastname: Patthey
authors.forename: R
authors.initials: R
authors.lastname: Follath