Resonant Raman scattering in the Pb2Sr2(Y,Ca)Cu3O8+δ superconductor
E. T. Heyen, R. Liu, M. Garriga, B. Gegenheimer, C. Thomsen, M. Cardona
DOI 10.1103/PhysRevB.41.830 · Physical Review B
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Abstract
We have measured resonant phonon Raman profiles of a superconducting Pb2Sr2Y0.75Ca0.25Cu3O8+δ crystal for laser energies from 1.65 to 2.7 eV. The resonances at 1.75 and 2.55 eV and the rise towards the uv, also seen in ellipsometry, are assigned to transitions involving the &–O(3) px,y, and Pb-O(1) complexes. There exists a relationship between the phonon-induced atomic motions and the location in the unit cell of the electronic transition. We also assign additional peaks that appear under resonant conditions.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pb2Sr2Y0.75Ca0.25Cu3O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 20 | Pressure not reported | unknown |
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