Surface crystallography and electronic structure of potassium yttrium tungstate
- Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk 90, 630090 (Russian Federation)
- Frantsevych Institute for Problems of Materials Science, NAS of Ukraine, 3 Krzhyzhanivsky Str., UA-03142 Kiev (Ukraine)
- Departments of Metallurgical and Materials Engineering and Electrical and Computer Engineering, University of Texas at El Paso, El Paso, Texas 79968 (United States)
Structural and electronic characteristics of KY(WO{sub 4}){sub 2} (KYW) (010) crystal surfaces have been studied using reflection high-energy electron diffraction (RHEED) and x-ray photoelectron spectroscopy (XPS). The results indicate that the crystal structure and chemical composition of the mechanically polished pristine surface is stoichiometrically well maintained as expected for KYW crystals. Combined measurements of RHEED and XPS as a function of 1.5 keV Ar{sup +} ion irradiation of the KYW (010) surfaces indicate amorphization, partial loss of potassium atoms, and partial transformation of chemical valence state of tungsten from W{sup 6+} to a lower valence state, W{sup 0} state predominantly, which induces electronic states at the top of valence band.
- OSTI ID:
- 21137421
- Journal Information:
- Journal of Applied Physics, Vol. 104, Issue 3; Other Information: DOI: 10.1063/1.2963957; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AMORPHOUS STATE
ARGON IONS
CHEMICAL COMPOSITION
CRYSTAL STRUCTURE
CRYSTALLOGRAPHY
ELECTRON DIFFRACTION
ELECTRONIC STRUCTURE
ION BEAMS
KEV RANGE 01-10
POTASSIUM
POTASSIUM COMPOUNDS
STOICHIOMETRY
SURFACES
TUNGSTEN
TUNGSTEN IONS
VALENCE
X-RAY PHOTOELECTRON SPECTROSCOPY
YTTRIUM TUNGSTATES