Origin of the peak-dip-hump line shape in the superconducting-state (pi,0) photoemission spectra of Bi2Sr2CaCu2O8 |
| |
Authors: | Kordyuk A A Borisenko S V Kim T K Nenkov K A Knupfer M Fink J Golden M S Berger H Follath R |
| |
Institution: | Institute for Solid State Research, IFW Dresden, P.O. Box 270016, Germany. |
| |
Abstract: | From detailed high-resolution measurements of the photon energy dependence of the (pi,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. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|