Structure of atomic sulfur overlayers on the Mo(001) surface using low-energy alkali ion scattering
Journal Article
·
· J. Vac. Sci. Technol., A; (United States)
It has been postulated that at submonolayer coverages the S adsorbs on top of the Mo(001) filling fourfold hollow sites, and that ordering in the overlayer is responsible for the sequence of LEED patterns. The authors applied low-energy K/sup +/ and Li/sup +/ ion scattering to test these structural models. Experimental details and cleaning procedures for the Mo(001) crystal were as in previous studies. (J. Vac. Sci Technol., A1, 1055(1983)). The energy distribution of backscattered ions was obtained as a function of S coverage for K/sup +/ and Li/sup +/ ions at incident energy E/sub i/ = 500 eV. The dependence of the intensity of certain features upon the polar angle of incidence has also been obtained. Representative K/sup +/ energy distributions obtained in the (110) azimuth for specular conditions are given. It is clear from the data that the S adatoms are located above the Mo surface rather than incorporated into it. 3 references, 1 figure.
- Research Organization:
- Oak Ridge National Lab., TN
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6489983
- Journal Information:
- J. Vac. Sci. Technol., A; (United States), Journal Name: J. Vac. Sci. Technol., A; (United States) Vol. A3:3; ISSN JVTAD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
640301 -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ADSORPTION
CATIONS
CHARGED PARTICLES
CHEMICAL ANALYSIS
COLLISIONS
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
ION COLLISIONS
ION SCATTERING ANALYSIS
IONS
LITHIUM IONS
METALS
MOLYBDENUM
NONDESTRUCTIVE ANALYSIS
NONMETALS
POTASSIUM IONS
SORPTION
SORPTIVE PROPERTIES
SULFUR
SURFACE PROPERTIES
SURFACES
TRANSITION ELEMENTS
360104* -- Metals & Alloys-- Physical Properties
640301 -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ADSORPTION
CATIONS
CHARGED PARTICLES
CHEMICAL ANALYSIS
COLLISIONS
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
ION COLLISIONS
ION SCATTERING ANALYSIS
IONS
LITHIUM IONS
METALS
MOLYBDENUM
NONDESTRUCTIVE ANALYSIS
NONMETALS
POTASSIUM IONS
SORPTION
SORPTIVE PROPERTIES
SULFUR
SURFACE PROPERTIES
SURFACES
TRANSITION ELEMENTS