High-Energy Scale Revival and Giant Kink in the Dispersion of a Cuprate Superconductor

2006/07/18 by B. P. Xie, Kaiyu Yang, K. Yang +27
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.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.98.147001

published as Phys. Rev. Lett. 98, 147001 (2007) · 4 pages, 3 figures, submitted to Phys. Rev. Lett. on May 21, 2006

arxiv created 2006/07/18 · openalex publication_date 2007/04/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

In the present photoemission study of a cuprate superconductor Bi1.74Pb0.38Sr1.88CuO6+delta, we discovered a large scale dispersion of the lowest band, which unexpectedly follows the band structure calculation very well. Similar behavior observed in blue bronze and the Mott insulator Ca2CuO2Cl2 suggests that the origin of hopping-dominated dispersion in an overdoped cuprate might be quite complicated. A giant kink in the dispersion is observed, and the complete self-energy containing all interaction information is extracted for a doped cuprate. These results recovered significant missing pieces in our current understanding of the electronic structure of cuprates.

Citations

• Evidence for ubiquitous strong electron–phonon coupling in high-temperature superconductors
• Asymmetry of the electronic states in hole- and electron-doped cuprates: Exact diagonalization study of the t-t′-t″-J model
• Coupling of theB1gPhonon to the Antinodal Electronic States ofBi2Sr2Ca0.92Y0.08Cu2O8+δ
• Dispersion of incoherent spectral features in systems with strong electron-phonon coupling
• Bare electron dispersion from experiment: Self-consistent self-energy analysis of photoemission data