Origin of the Peak-Dip-Hump Line Shape in the Superconducting-State (π,0) Photoemission Spectra of Bi2Sr2CaCu2O8
A. A. Kordyuk, S. V. Borisenko, T. K. Kim, K. A. Nenkov, M. Knupfer, J. Fink, M. S. Golden, H. Berger, R. Follath
DOI 10.1103/PhysRevLett.89.077003 · Physical Review Letters
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Abstract
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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Pb-Bi2212 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 69 | Pressure not reported | unknown |
| Bi2212 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89 | Pressure not reported | unknown |
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