XPS study of the O 1s spectra of (Bi,Pb)2Sr2CaCu2Ox and Bi2Sr2CaCu2Ox high-Tc superconductors

J. A. Leiro; M. H. Heinonen; K. Elboussiri

doi:10.1103/PhysRevB.52.82

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XPS study of the O 1s spectra of (Bi,Pb)2Sr2CaCu2Ox and Bi2Sr2CaCu2Ox high-Tc superconductors

J. A. Leiro, M. H. Heinonen, K. Elboussiri

DOI 10.1103/PhysRevB.52.82 · Physical Review B

T1

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Abstract

The O 1s x-ray photoemission spectra of (Bi,Pb)2Sr2CaCu2Ox and Bi2Sr2CaCu2Ox single crystals are presented. The same spectra are also measured in the case of ceramics. Two features are clearly identified. It is found that the shoulder possessing the smallest binding energy is more pronounced for the single crystal with Pb than that of the pure compound of the same 2:2:1:2 phase. This suggests that the main contribution to the O 1s x-ray photoemission spectroscopy spectrum of a lead-free Bi2Sr2CaCu2Ox compound is due to oxygens in the Bi-O plane of a cleaved surface.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	75	Pressure not reported	unknown
Bi1.7Pb0.3Sr1.6Ca0.8Cu2.2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	85	Pressure not reported	unknown
Bi2Sr2CaCu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	67	Pressure not reported	unknown