Melting studies of argon on ZYX graphite

Journal Article · Thu Jan 15 04:00:00 EST 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.35.1419· OSTI ID:6089044

Nielsen, M; Als-Nielsen, J; Bohr, J; McTague, J P; Moncton, D E; Stephens, P W

The melting of physisorbed monolayers of argon on graphite has been studied by high-resolution synchrotron-x-ray diffraction. At submonolayer coverages the diffraction profile of the argon (10) Bragg peak is found to undergo a continuous broadening near the melting transition. An analysis of the line shape shows characteristic two-dimensional behavior. Furthermore, the continuous evolution of the coherence length is shown to surpass length scales of 800 A. This is in sharp contrast to xenon which at submonolayer densities suffers a first-order melting transition. Compared to the continuous melting of denser xenon monolayers the argon data address a reduced temperature region significantly closer to the melting region, and thereby provide a stricter test of the nature of the transition.

• Research Organization: Riso-dash-bar National Laboratory, DK-4000, Roskilde, Denmark
• OSTI ID: 6089044
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 35:3; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ADSORPTION
ARGON
BRAGG REFLECTION
BREMSSTRAHLUNG
CARBON
COHERENCE LENGTH
COHERENT SCATTERING
DATA
DIFFRACTION
DIMENSIONS
ELECTROMAGNETIC RADIATION
ELEMENTAL MINERALS
ELEMENTS
EXPERIMENTAL DATA
FILMS
FLUIDS
GASES
GRAPHITE
INFORMATION
LENGTH
LINE BROADENING
LINE WIDTHS
MELTING
MINERALS
NONMETALS
NUMERICAL DATA
PHASE TRANSFORMATIONS
RADIATIONS
RARE GASES
REFLECTION
SCATTERING
SORPTION
SUBSTRATES
SYNCHROTRON RADIATION
TWO-DIMENSIONAL CALCULATIONS
X-RAY DIFFRACTION