Oxygen withdrawal, copper valency, and interface reaction for Fe/La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4/
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
High-resolution x-ray photoemission spectroscopy was used to study reactive interface formation for Fe adatoms deposited onto the high-temperature superconductor La/sub 1.85/Sr/sub 0.15/CuO/sub 4/. Fe deposition reduces the emission within approx. =3 eV of the Fermi level, indicating disruption of the hybrid Cu 3d/sub x//sub <2/-y/sup =/--O 2p/sub x//sub ,//sub y/ states responsible for superconductivity. Strong reaction of Fe adatoms with substrate oxygen is observed for coverages ranging from 0.25 to 8 A, and oxygen is withdrawn to form Fe-O. The chemical states of Cu are selectively changed with a quenching of the Cu/sup 2+/ configuration but the persistence of the Cu/sup 1+/ configuration.
- Research Organization:
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455
- OSTI ID:
- 6292404
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Journal Issue: 7 Vol. 36:7; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
INTERFACES
IONIZING RADIATIONS
IRON
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
METALS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
RARE EARTH COMPOUNDS
SORPTION
SORPTIVE PROPERTIES
SPECTROSCOPY
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VALENCE
X RADIATION
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
INTERFACES
IONIZING RADIATIONS
IRON
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
METALS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
RARE EARTH COMPOUNDS
SORPTION
SORPTIVE PROPERTIES
SPECTROSCOPY
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VALENCE
X RADIATION