Electronic spectrum of high temperature superconductors

✍ Scribed by G. Varelogiannis

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 212 KB
• Volume: 235-240
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)92411-2

✦ Synopsis

Characteristic anomalies in the electronic spectrum of superconducting BiSr2CaCu20s are analyzed in the context of Eliashberg theory. The finite density of states inside the gap at finite temperatures and the anomalous temperature dependence of the experimental gap are due to the recombination processes. The anomalous dip-like structure above the gap is evidence of the breakdown of Landau Fermi liquid picture because of the strong electronboson coupling. The second peak or broad band at higher energies is indicative of the existence of local pairs. The whole behaviour indicates that the system is at the beginning of a cross-over from BCS superconductivity to Bose condensation.