2005/01/15 by Jian-Xin Li, Jian‐Xin Li, Tao Zhou +2
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.72.094515
4 pages, 4 figures
arxiv created 2005/01/15 · openalex publication_date 2005/09/27 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The renormalization of quasiparticle (QP) dispersion in bilayer high-Tc cuprates is investigated theoretically by examining, respectively, the interactions of the QP with spin fluctuations and phonons. It is illustrated that both interactions are able to give rise to a kink in the dispersion around the antinodes [near (\ensuremathπ,0)]. However, remarkable differences between the two cases are found for the peak/dip/hump structure in the line shape, the QP weight, and the interlayer coupling effect on the kink, which are suggested to serve as a discriminance to single out the dominant interaction in the superconducting state. A comparison to recent photoemission experiments shows clearly that the coupling to the spin resonance is dominant for the QP around antinodes in bilayer systems.