"Kinks", Nodal Bilayer Splitting and Interband Scattering in YBCO
Abstract
We apply the new-generation ARPES methodology to the most widely studied cuprate superconductor YBCO. 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 BSCCO. 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.
Keywords
Cite
@article{arxiv.cond-mat/0511596,
title = {"Kinks", Nodal Bilayer Splitting and Interband Scattering in YBCO},
author = {S. V. Borisenko and A. A. Kordyuk and V. Zabolotnyy and J. Geck and D. Inosov and A. Koitzsch and J. Fink and M. Knupfer and B. Buechner and V. Hinkov and C. T. Lin and B. Keimer and T. Wolf and S. G. Chiuzb{ă}ian and L. Patthey and R. Follath},
journal= {arXiv preprint arXiv:cond-mat/0511596},
year = {2009}
}
Comments
4.5 RevTeX pages, 4 eps figures