Investigation of the superconducting order parameter in Bi2Sr2CaCu2O8 single crystals
T. Staufer, R. Nemetschek, R. Hackl, P. Müller, H. Veith
DOI 10.1103/PhysRevLett.68.1069 · Physical Review Letters
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Abstract
Single crystals of Bi2Sr2CaCu2O8+δ with different oxygen concentrations were investigated by Raman scattering. Dependent on the polarizations of the incident and the scattered light, the electronic spectra measured well below Tc show either zero or finite intensity at small energy transfers. In oxygen-annealed crystals, the superconducting order parameter Δ is temperature dependent. In contrast, Δ is almost constant in the essentially two-dimensional argon-annealed samples.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 86 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 79 | Pressure not reported | unknown |
| YBa2Cu3O7 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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