Resonance Raman Study of the Superconducting Gap and Low Energy Excitations in Tl2Ba2CuO6+δ Superconductors
Moonsoo Kang, G. Blumberg, M. V. Klein, N. N. Kolesnikov
DOI 10.1103/PhysRevLett.77.4434 · Physical Review Letters
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Abstract
Low energy electronic Raman scattering from Tl2Ba2CuO6+δ single crystals with Tc=25and85K has been studied using excitation energies from 1.65 to 3.05 eV. The B1g 2Δ peak position shows that the 2Δ/kBTc value decreases as the doping level increases. The resonance profiles of the 2Δ peak and the continuum show similar and strong resonances towards the 3.4 eV optical absorption peak in both crystals, which indicates that (1) the 2Δ peak and the continuum are coupled to light scattering by the same mechanism, and (2) the light scattering mechanism for both features involves the 3.4 eV optical absorption process.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl2Ba2CuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 25 | Pressure not reported | unknown |
| Tl2Ba2CuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85 | Pressure not reported | unknown |
| YBa2Cu3O6+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2-xSrxCuO4 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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