Constituents of the Quasiparticle Spectrum Along the Nodal Direction of High-Tc Cuprates

Authors

A. A. Kordyuk, Institut fur Festkoerper und Werkstofforschung Dresden, Germany
S. V. Borisenko, National Academy of Sciences of Ukraine
V. B. Zabolotnyy, Institut fur Festkoerper und Werkstofforschung Dresden, Germany
J. Geck, Institut fur Festkoerper und Werkstofforschung Dresden, Germany
M. Knupfer, Institut fur Festkoerper und Werkstofforschung Dresden, Germany
J. Fink, Institut fur Festkoerper und Werkstofforschung Dresden, Germany
B. Buchner, Institut fur Festkoerper und Werkstofforschung Dresden, Germany
C. T. Lin, Max-Planck Institut fur Festkorperforschung, GermanyFollow
B. Keimer, Max-Planck Institut fur Festkorperforschung, Germany
H. Berger, Ecole Polytechnique Federale de Lausanne, Switzerland
A. V. Pan, University of WollongongFollow
S. Komiya, Central Research Institute of Electric Power Industry, Japan
Y. Ando, Central Research Institute of Electric Power Industry, Japan

RIS ID

17974

Publication Details

This article was originally published as: Kordyuk, AA, Borisenko, SV, Zabolotnyy, VB, et al, Constituents of the Quasiparticle Spectrum Along the Nodal Direction of High-Tc Cuprates, Physical Review Letters, 2006, 97(1), 017002. Copyright 2006 American Physical Society. The original journal can be found here.

Abstract

Applying the Kramers-Kronig consistent procedure, developed earlier, we investigate in detail the formation of the quasiparticle spectrum along the nodal direction of high-Tc cuprates. The heavily discussed ‘‘70 meV kink’’ on the renormalized dispersion exhibits a strong temperature and doping dependence when purified from structural effects such as bilayer splitting, diffraction replicas, etc. This dependence is well understood in terms of fermionic and bosonic constituents of the self-energy. The latter follows the evolution of the spin-fluctuation spectrum, emerging below some doping dependent temperature and sharpening below Tc, and is mainly responsible for the formation of the kink in question.