We examine the time evolution of the O 1s core-level and valence-band spectra of high-quality Pb-free and -doped Bi2Sr2CaCu2O8(001) single crystals cleaved at 20 K in ultrahigh vacuum. A component line at 533.5 eV of the O 1s spectrum is unambiguously identified as extrinsic and separated by the doublet structure related to the normal-state electronic structure of this compound. Evidence is given of the surface physisorption of carbon monoxide at low temperature (<30 K) that is removed at room temperature without loss of stoichiometric oxygen. The effects of pollution on the valence-band features are monitored and correlated with those of the core spectra. Spectral changes due to electron etching are also addressed. © 1991 The American Physical Society.

Balzarotti, A., DE CRESCENZI, M., Motta, N., Patella, F., Sgarlata, A., Paroli, P., et al. (1991). X-ray-photoemission-spectroscopy study of the surface deterioration of Bi2Sr2CaCu2O8 and Bi1.7Pb0.3Sr2CaCu2O8 single crystals at 26 K. PHYSICAL REVIEW. B, CONDENSED MATTER, 43(13), 11500-11503 [10.1103/PhysRevB.43.11500].

X-ray-photoemission-spectroscopy study of the surface deterioration of Bi2Sr2CaCu2O8 and Bi1.7Pb0.3Sr2CaCu2O8 single crystals at 26 K

BALZAROTTI, ADALBERTO;DE CRESCENZI, MAURIZIO;PATELLA, FULVIA;SGARLATA, ANNA;BALESTRINO, GIUSEPPE;MARINELLI, MARCO
1991-01-01

Abstract

We examine the time evolution of the O 1s core-level and valence-band spectra of high-quality Pb-free and -doped Bi2Sr2CaCu2O8(001) single crystals cleaved at 20 K in ultrahigh vacuum. A component line at 533.5 eV of the O 1s spectrum is unambiguously identified as extrinsic and separated by the doublet structure related to the normal-state electronic structure of this compound. Evidence is given of the surface physisorption of carbon monoxide at low temperature (<30 K) that is removed at room temperature without loss of stoichiometric oxygen. The effects of pollution on the valence-band features are monitored and correlated with those of the core spectra. Spectral changes due to electron etching are also addressed. © 1991 The American Physical Society.
1991
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/03 - FISICA DELLA MATERIA
English
Con Impact Factor ISI
Balzarotti, A., DE CRESCENZI, M., Motta, N., Patella, F., Sgarlata, A., Paroli, P., et al. (1991). X-ray-photoemission-spectroscopy study of the surface deterioration of Bi2Sr2CaCu2O8 and Bi1.7Pb0.3Sr2CaCu2O8 single crystals at 26 K. PHYSICAL REVIEW. B, CONDENSED MATTER, 43(13), 11500-11503 [10.1103/PhysRevB.43.11500].
Balzarotti, A; DE CRESCENZI, M; Motta, N; Patella, F; Sgarlata, A; Paroli, P; Balestrino, G; Marinelli, M
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/45727
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