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Origin of the peak-dip-hump structure in the photoemission spectra of Bi2212

A. A. Kordyuk·S. V. Borisenko·T. K. Kim·K. Nenkov·M. Knupfer·M. S. Golden·J. Fink·H. Berger·R. Follath
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Abstract

The famous peak-dip-hump lineshape of the (π,0) photoemission spectrum of the bilayer Bi HTSC in the superconducting state is shown to be 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 'superconducting' peak is due to the antibonding Cu-O-related band, while the hump is mainly formed by its bonding counterpart, with a c-axis bilayer coupling induced splitting of about 140 meV.

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A. A. Kordyuk, S. V. Borisenko, T. K. Kim, K. Nenkov, M. Knupfer, M. S. Golden, J. Fink, H. Berger, R. Follath. 2001-10-19. Origin of the peak-dip-hump structure in the photoemission spectra of Bi2212. https://doi.org/10.1103/physrevlett.89.077003

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