Quasiparticle spectrum in the high-Tc superconducting state
Georgios Varelogiannis
DOI 10.1103/PhysRevB.51.1381 · Physical Review B
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Abstract
Some characteristic anomalies above the gap reported by tunneling and photoemission spectroscopies on Bi2Sr2CaCu2O8 are reproduced numerically and analyzed in the context of conventional strong-coupling theory of superconductivity. The anomalous diplike structure above the gap is evidence of the breakdown of the Landau Fermi-liquid picture because of the strong electron-boson coupling. The second peak or broad band at higher energies is due to the existence of almost localized pairs, indicating that the system is at the beginning of a crossover from BCS superconductivity to Bose condensation.
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 |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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