Optical Evidence of an Electronic Contribution to the Pairing Interaction in Superconducting Tl2Ba2Ca2 Cu3O10
M. J. Holcomb, J. P. Collman, W. A. Little
DOI 10.1103/PhysRevLett.73.2360 · Physical Review Letters
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Abstract
We report the results of a study of the temperature-dependent thermal difference reflectance spectra of Tl2Ba2Ca2 Cu3O10. At temperatures below Tc, a feature emerges in the spectra with an integrated amplitude that scales as Δ02(T), where Δ0(T) is the temperature-dependent superconducting gap. The temperature dependence and location of this feature can be described by an Eliashberg model with a coupling function that includes both an electron-phonon interaction and an interaction located at ∼1.6 eV. We find remarkably good agreement between theory and experiment based upon this description of the superconducting state.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl2Ba2Ca2Cu3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 120 | Pressure not reported | unknown |
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