Origin of the photoemission final-state effects in Bi2Sr2CaCu2O8 by very-low-energy electron diffraction

Abstract

Very-low-energy electron diffraction with a support of full-potential band calculations is used to achieve the energy positions, K// dispersions, lifetimes and Fourier compositions of the photoemission final states in Bi2Sr2CaCu2O8 at low excitation energies. Highly structured final states explain the dramatic matrix element effects in photoemission. Intense c(2x2) diffraction reveals a significant extrinsic contribution to the shadow Fermi surface. The final-state diffraction effects can be utilized to tune the photoemission experiment on specific valence states or Fermi surface replicas.

arXiv comment4 pages, 3 Postscript figures, submitted to Phys. Rev. Lett; major revisions

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Cited by in corpus (4)

• Origin of the shadow Fermi surface in Bi-based cuprates
• Shadow bands in single-layered Bi_2Sr_2CuO_6 studied by angle-resolved photoemission spectroscopy
• Resolving unoccupied electronic states with laser ARPES in bismuth-based cuprate superconductors
• Rotation symmetry breaking in La2-xSrxCuO4 revealed by ARPES