Parallel valence- and core-level photoemission studies of the metal-to-nonmetal transition in YBa/sub 2/Cu/sub 3/O/sub 7-//sub x/

Journal Article · Sun Jan 01 04:00:00 EST 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.231· OSTI ID:6757375

Flavell, W R; Egdell, R G

Valence-level and Cu 2p core-level photoemission spectra for YBa/sub 2/Cu/sub 3/O/sub 7-//sub x/ in both metallic (x<0.5) and nonmetallic (x>0.5) phases are presented together for the first time. The core spectra show evidence for holes in the hybrid Cu 3dO2$p valence levels in the metallic state, but nonetheless the density of states at the Fermi energy seen in valence-level photoemission is at most 0.05 states/eV cell.

• Research Organization: Center for High-Temperature Superconductivity, Department of Chemistry, Imperial College of Science and Technology, University of London, London SW7chemically bond2AZ, United Kingdom
• OSTI ID: 6757375
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:1; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
&amp; Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ENERGY LEVELS
ENERGY-LEVEL DENSITY
FERMI LEVEL
HOLES
IONIZING RADIATIONS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
X RADIATION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES