Impact-collision ion-scattering spectroscopy of Cu(110) and Cu(110)-(2 x 1)-O using 5-keV /sup 6/Li/sup +/

Journal Article · Sat Mar 15 04:00:00 EST 1986 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.33.3856· OSTI ID:6008349

Yarmoff, J A; Cyr, D M; Huang, J H; Kim, S; Williams, R S

Impact-collision ion-scattering spectroscopy was performed using 5-keV /sup 6/Li/sup +/ ions to study the Cu(110) and Cu(110)-(2 x 1)-O surfaces. Polar-angle scans were collected for scattering along the (110), (112), and (001) azimuths. These scans were quantitatively analyzed by comparing them to the results of an algorithm that combined a one-atom Monte Carlo computer simulation with various structural models to calculate trial polar scans. The results for the clean surface support a model in which the first- to second-atomic-layer spacing was contracted (10 +- 5)% compared to the bulk spacings and the vibrational amplitudes of the atoms in the outermost atomic layer were enhanced by a factor of 1.5 over the bulk vibrational amplitude. For a surface with a 200 L oxygen exposure (1 Lequivalent10/sup -6/ torr sec), the results were not consistent with a buckled-row model, but indicated that every other (001) atom row was missing, the first-to second-layer spacing was expanded (25 +- 10)%, and the second- to third-layer spacing was contracted (10 +- 5)%. At higher oxygen exposures, the surface Cu layer became disordered.

• Research Organization: Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90024
• OSTI ID: 6008349
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 33:6; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHARGED PARTICLES
CHEMICAL ANALYSIS
COLLISIONS
CONTAMINATION
COPPER
CRYSTAL FACES
CRYSTAL STRUCTURE
ELEMENTS
ION COLLISIONS
ION SCATTERING ANALYSIS
IONS
LATTICE PARAMETERS
LATTICE VIBRATIONS
LITHIUM IONS
METALS
MONTE CARLO METHOD
NONDESTRUCTIVE ANALYSIS
NONMETALS
OXYGEN
SIMULATION
SURFACE CONTAMINATION
TRANSITION ELEMENTS