Doping dependence of the coupling of electrons to bosonic modes in the single-layer high-temperature Bi2Sr2CuO6 superconductor. Journal Article uri icon



  • A recent highlight in the study of high-T(c) superconductors is the observation of band renormalization or self-energy effects on the quasiparticles. This is seen in the form of kinks in the quasiparticle dispersions as measured by photoemission and interpreted as signatures of collective bosonic modes coupling to the electrons. Here we compare for the first time the self-energies in an optimally doped and strongly overdoped, nonsuperconducting single-layer Bi-cuprate (Bi2Sr2CuO6). In addition to the appearance of a strong overall weakening, we also find that the weight of the self-energy in the overdoped system shifts to higher energies. We present evidence that this is related to a change in the coupling to c-axis phonons due to the rapid change of the c-axis screening in this doping range.

publication date

  • April 21, 2006

has restriction

  • green

Date in CU Experts

  • August 22, 2017 4:31 AM

Full Author List

  • Meevasana W; Ingle NJC; Lu DH; Shi JR; Baumberger F; Shen KM; Lee WS; Cuk T; Eisaki H; Devereaux TP

author count

  • 13

Other Profiles

International Standard Serial Number (ISSN)

  • 0031-9007

Additional Document Info

start page

  • 157003


  • 96


  • 15