Tetra point wetting at the free surface of liquid Ga-Bi |
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Authors: | Huber P Shpyrko O G Pershan P S Ocko B M DiMasi E Deutsch M |
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Institution: | Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA. |
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Abstract: | 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 d(u) = 3 upper critical dimensionality. |
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