High-energy scale revival and giant kink in the dispersion of a cuprate superconductor

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. The incoherent nature of the spectra suggests that the hopping-dominated dispersion occurs possibly with the assistance of local spin correlations. A giant kink in the dispersion is observed, and the complete self-energy containing all interaction information is extracted for a doped cuprate in the low energy region. These results recovered significant missing pieces in our current understanding of the electronic structure of cuprates.

4 pages, 3 figures, submitted to Phys. Rev. Lett. on May 21, 2006

References in corpus (7)

• Variational cluster approach to spontaneous symmetry breaking: The itinerant antiferromagnet in two dimensions
• Self-consistent self-energy analysis of photoemission data
• Bare electron dispersion from photoemission experiments
• Anomalous high energy dispersion in photoemission spectra from insulating cuprates
• Asymmetry of the electronic states in hole- and electron-doped cuprates: Exact diagonalization study of the t-t'-t''-J model
• Dispersion of incoherent spectral features in systems with strong electron-phonon coupling
• Normal state electronic structure in the heavily overdoped regime of Bi1.74Pb0.38Sr1.88CuO6+delta single-layer cuprate superconductors

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