Observation of a first-order phase transition in Xe/Ta(110) by photoelectron spectroscopy

Journal Article · Tue Jan 01 04:00:00 EST 1985 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.31.623· OSTI ID:6189420

Raaen, S; Ruckman, M; Strongin, M

A photoemission study of submonolayer coverages of Xe on the Ta (110) surface, at temperatures around 20 and 80 K, is presented. We argue that at low coverages, less than roughly-equal15%, the Xe atoms occupy the ''deep'' sites on the surface, presumably in a disordered fashion. When the coverage is increased, the Xe atoms start forming islands at elevated positions above the Ta surface as the interaction between Xe forms a denser phase. Different local work functions in the two phases make it possible to study this first-order phase transition by photoelectron spectroscopy.

• Research Organization: Brookhaven National Laboratory, Upton, New York 11973
• OSTI ID: 6189420
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 31:1; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
COATINGS
CONCENTRATION RATIO
CONTAMINATION
CRYSTAL FACES
ELECTRON SPECTROSCOPY
ELEMENTS
FILMS
FLUIDS
FUNCTIONS
GASES
METALS
NONMETALS
PHASE TRANSFORMATIONS
PHOTOELECTRON SPECTROSCOPY
RARE GASES
SORPTION
SPECTROSCOPY
SUBSTRATES
SURFACE CONTAMINATION
TANTALUM
THIN FILMS
TRANSITION ELEMENTS
WORK FUNCTIONS
XENON