Raman scattering from single crystals of the 84-K superconductor Bi2.2Ca0.8Sr2Cu2O8+δ

Michael Stavola; D. M. Krol; L. F. Schneemeyer; S. A. Sunshine; R. M. Fleming; J. V. Waszczak; S. G. Kosinski

doi:10.1103/PhysRevB.38.5110

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Raman scattering from single crystals of the 84-K superconductor Bi2.2Ca0.8Sr2Cu2O8+δ

Michael Stavola, D. M. Krol, L. F. Schneemeyer, S. A. Sunshine, R. M. Fleming, J. V. Waszczak, S. G. Kosinski

DOI 10.1103/PhysRevB.38.5110 · Physical Review B

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Abstract

We report the Raman spectrum of single crystals of Bi2.2Ca0.8Sr2Cu2O8+δ. The most prominent features are at 120, 295, 462, and 625 cm−1. The 462-cm−1 mode is tentatively assigned to axial O(3) symmetric stretching. The 625-cm−1 mode is assigned to planar Cu-O(1) bond stretching. The 120-cm−1 mode shows a strong a-b anisotropy. The effect of the b-axis superstructure upon the Raman spectrum is emphasized.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2.2Ca0.8Sr2Cu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	84	Pressure not reported	unknown
Bi2CaSr2Cu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	84	Pressure not reported	unknown