Phys. Rev. Lett. 89, 077003 (2002) [4 pages]Origin of the Peak-Dip-Hump Line Shape in the Superconducting-State (π,0) Photoemission Spectra of Bi2Sr2CaCu2O8Received 18 October 2001; published 30 July 2002 From detailed high-resolution measurements of the photon energy dependence of the (π,0) superconducting-state photoemission spectrum of the bilayer Bi high-temperature superconductors, we show that the famous peak-dip-hump line shape is dominated by a superposition of spectral features originating from different electronic states which reside at different binding energies, but are each describable by essentially identical single-particle spectral functions. The previously identified bilayer-split CuO2 bands are the culprit: with the ”superconducting” peak being due to the antibonding band, while the hump is mainly formed by its bonding bilayer-split counterpart. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.077003
DOI:
10.1103/PhysRevLett.89.077003
PACS:
74.25.Jb, 71.18.+y, 74.72.Hs, 79.60.–i
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