Copper L/sub 2,3/ near-edge structure in Cu/sub 2/O
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
We report on high-resolution total-yield measurements of the Cu L/sub 2,3/ absorption edge in Cu/sub 2/O using the JUMBO monochromator at the Stanford Synchrotron Radiation Laboratory. Care was taken to prepare the surface of a well-characterized single crystal, rather than use oxidized copper. A comparison was also made with electron-energy-loss spectra (transmission of a thin Cu/sub 2/O crystal). Prominent white lines or core excitons appear at the spin-orbit-split Cu L/sub 3/ (931 eV) and L/sub 2/ (951 eV) thresholds. These edge features are like those observed in CuO (even though the Cu d states are filled in Cu/sub 2/O) but are asymmetrically broadened on the high-energy side, probably due to more than one component. The core binding energy is measured by photoemission, and local states are compared with transitions to the continuum. We believe that the strong edge features in Cu/sub 2/O can be understood in part as transitions to antibonding molecular-orbital states of the linear O-Cu-O molecular cluster peculiar to copper in the Cu/sub 2/O crystal structure.
- Research Organization:
- Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, 1110 W. Green St., Urbana, Illinois
- OSTI ID:
- 6568513
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 30:4; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ABSORPTION SPECTRA
BINDING ENERGY
BREMSSTRAHLUNG
CHALCOGENIDES
COPPER
COPPER COMPOUNDS
COPPER OXIDES
COUPLING
CRYSTALS
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION
ENERGY
EXCITONS
INTERMEDIATE COUPLING
L-S COUPLING
METALS
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHOTOEMISSION
QUASI PARTICLES
RADIATIONS
SECONDARY EMISSION
SPECTRA
SYNCHROTRON RADIATION
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
360104* -- Metals & Alloys-- Physical Properties
ABSORPTION SPECTRA
BINDING ENERGY
BREMSSTRAHLUNG
CHALCOGENIDES
COPPER
COPPER COMPOUNDS
COPPER OXIDES
COUPLING
CRYSTALS
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION
ENERGY
EXCITONS
INTERMEDIATE COUPLING
L-S COUPLING
METALS
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHOTOEMISSION
QUASI PARTICLES
RADIATIONS
SECONDARY EMISSION
SPECTRA
SYNCHROTRON RADIATION
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS