Growth and structural characterization of a lead overlayer on Cu(100)

Journal Article · Wed May 01 00:00:00 EDT 1991 · Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA)

DOI:https://doi.org/10.1116/1.577491· OSTI ID:5536088

Li, W; Lin, J ^[1]; Karimi, M ^[2]; Vidali, G ^[1]

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1. Physics Department, Syracuse University, Syracuse, New York 13244 (USA)
2. Physics Department, Alabama A M University, Normal, Alabama 35762 (USA)

Ordered phases of Pb on Cu(100) have been studied using helium beam scattering and performing charge density calculations. At low adsorption temperature, we obtain a (5{times}5){ital R} tan{sup {minus}1}(3/4) phase. A structure model with square symmetry and superstructure buckling has been put forward. Calculated charge density profile which shows a buckled superstructure is in good agreement with our structural model. We have also investigated the {ital C}(5{times}){ital R}45{degree} phase which is adsorbed at high temperature. By analyzing measured diffraction peaks, we showed that this overlayer is flat and the lead atoms near the antiphase domain walls are sitting at the same levels as the other lead atoms. The thermal behavior of diffraction peak intensities shows that this phase undergoes a first order transition at 503 K.

• OSTI ID: 5536088
• Journal Information: Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA), Journal Name: Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA) Vol. 9:3; ISSN JVTAD; ISSN 0734-2101
• Country of Publication: United States
• Language: English

Related Subjects

656003* -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ADSORPTION
ATOMIC BEAM DIFFRACTION
ATOMIC BEAMS
BEAMS
CHARGE DENSITY
COHERENT SCATTERING
COPPER
CRYSTAL FACES
DEPOSITION
DIFFRACTION
DOMAIN STRUCTURE
ELEMENTS
FILMS
FLUIDS
GASES
HELIUM
LEAD
METALS
NONMETALS
PHASE STUDIES
RARE GASES
SCATTERING
SORPTION
SURFACE COATING
THIN FILMS
TRANSITION ELEMENTS