Characterization of Bi sub 2 Sr sub 2 Ca sub 1 Cu sub 2 O sub 8

Conference · Wed Feb 01 04:00:00 EST 1989 · AIP Conference Proceedings (American Institute of Physics); (USA)

OSTI ID:7122790

Himpsel, F J; Chandrashekhar, G V; Taleb-Ibrahimi, A; McLean, A B; Shafer, M W ^[1]

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1. IBM Research Division, T. J. Watson Research Center, Yorktown Heights, NY 10598 (USA)

The electronic structure of the high temperature superconductor Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub 8+x} is determined from single crystal samples using photoelectron spectroscopy and polarization dependent near edge absorption spectroscopy. The valence band exhibits at O2p, Cu3d peak at 3.5 eV below the Fermi level E{sub F}. The photoemission intensity at E{sub F} is higher than in the other high temperature superconductors. Also, the peak at E{sub F}-9 eV, previously associated with carbonate, is absent. A resonant Cu3d{sup 8} satellite is seen at E{sub F}-12.6 eV, giving a hole-hole repulsion U=5.6 eV at the Cu site. The O1s edge exhibits a peak at threshold, h{nu}=528.2 eV, corresponding to O2p holes at E{sub F}. This peak is excited only by the component of the electric field vector in the ab-plane. Using a dipole selection rules for the O1s-O2p transition it is concluded that the oxygen holes have p{sub x,y} character, with x,y in the CuO planes.

• OSTI ID: 7122790
• Report Number(s): CONF-881035--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Journal Volume: 182:1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ABSORPTION SPECTROSCOPY
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CHALCOGENIDES
CHARGED PARTICLES
COPPER IONS
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRIC FIELDS
ELECTRICAL PROPERTIES
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
IONS
OXIDES
OXYGEN COMPOUNDS
OXYGEN IONS
PEROVSKITES
PHOTOELECTRON SPECTROSCOPY
PHYSICAL PROPERTIES
SAMPLE PREPARATION
SPECTROSCOPY
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY