Ordering of metal overlayers on metal substrates studied using atom beam scattering

Journal Article · Tue May 01 00:00:00 EDT 1990 · Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA)

DOI:https://doi.org/10.1116/1.576627· OSTI ID:6800476

Vidali, G; Hutchings, C W; Dowben, P A ^[1]; Karimi, M ^[2]; Moses, C ^[3]; Foresti, M ^[4]

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1. Physics Department, Syracuse University, Syracuse, NY (USA)
2. Physics Department, Alabama A M University, Normal, AL (USA)
3. Physics Department, Utica College, Utica, NY (USA)
4. Dipartimento di Fisica, Universita di Campobasso, Campobasso (Italy)

We will illustrate how atom beam scattering (ABS) can be used to study the growth and ordering of adsorption of Hg on Cu(001). At low coverage (less than 2% of a monolayer), we obtain that the scattering cross section of He with (adsorbed) Hg is about 50 A{sup 2}. We find that mercury forms two stable phases on Cu(001) in the temperature range between 200 and 330 K, a {ital c}(2{times}2) and a high density {ital c}(4{times}4) phase. From ABS diffraction data, we can deduce the corrugation of the surface electron charge density of the mercury layer in the two ordered phases. From the analysis of our data, we obtain a Debye temperature for the Hg overlayer of about 115 K. We will report preliminary calculations on the adsorption energy of Hg on Cu(001) and on the interaction of He with a Hg preplated Cu(001) surface.

• OSTI ID: 6800476
• 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. 8:3; 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 BEAMS
BEAMS
COPPER
DEBYE TEMPERATURE
ELECTRONIC STRUCTURE
ELEMENTS
FILMS
LOW TEMPERATURE
MEDIUM TEMPERATURE
MERCURY
METALS
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
THIN FILMS
TRANSITION ELEMENTS