Electronic structure of Bi-Ca-Sr-Cu-O superconductors studied by photoelectron spectroscopy

Z. -X. Shen; P. A. P. Lindberg; I. Lindau; W. E. Spicer; C. B. Eom; T. H. Geballe

doi:10.1103/PhysRevB.38.7152

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Electronic structure of Bi-Ca-Sr-Cu-O superconductors studied by photoelectron spectroscopy

Z. -X. Shen, P. A. P. Lindberg, I. Lindau, W. E. Spicer, C. B. Eom, T. H. Geballe

DOI 10.1103/PhysRevB.38.7152 · Physical Review B

T1

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Abstract

Photoelectron spectroscopy has been used to study the electronic structure of the newly discovered Bi-Ca-Sr-Cu-O superconductors. A clear Fermi edge is observed showing a metallic behavior. The oxygen 1s core level shows only one peak, in contrast to previous results on YBa2Cu3O7−δ. We suggest that the Fermi edge observed is mainly due to electrons derived from Bi-O p bands.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2CaSr2Cu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	85	Pressure not reported	onset
Bi2Ca2Sr2Cu3O10+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	105	Pressure not reported	onset
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown