2008/04/06 by W.S. Lee, W. S. Lee, W. Meevasana +15
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.77.140504
published as Phys. Rev. B 77, 140504(R) (2008) · 4 page 3 figures,submitted ro PRB
arxiv created 2008/04/06 · openalex publication_date 2008/04/11 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The temperature dependent evolution of the renormalization effect in optimally doped Bi2Sr2Ca0.92Y0.08Cu2O_8+\ensuremathδ along the nodal direction has been studied via angle-resolved photoemission spectroscopy. Fine structure is observed in the real part of the self-energy (Re\phantom\rule0.2em0ex\ensuremathΣ), including a subkink and maximum, suggesting that electrons couple to a spectrum of bosonic modes, instead of just one mode. Upon cooling through the superconducting phase transition, the fine structures of the extracted Re\phantom\rule0.2em0ex\ensuremathΣ exhibit a two-processes evolution demonstrating an interplay between kink renormalization and superconductivity. We show that this two-process evolution can be qualitatively explained by a simple Holstein model in which a spectrum of bosonic modes is considered.