A continuous surface wetting transition, pinned to a solid-liquid-liquid-vapor tetra coexistence point, is studied by x-ray reflectivity in liquid Ga-Bi binary alloys. The short-range surface potential is determined from the measured temperature evolution of the wetting film. The thermal fluctuations are shown to be insufficient to induce a noticeable breakdown of mean-field behavior, expected in short-range-interacting systems due to their du = 3 upper critical dimensionality.
Physical Review Letters
- Pub Date:
- June 2002
- Condensed Matter - Statistical Mechanics;
- Condensed Matter - Materials Science
- 4 pages (RevTeX 4), 3 eps figures, submitted to Physical Review Letters