Huber, P.Shpyrko, O. G.Pershan, PeterOcko, B. M.DiMasi, E.Deutsch, M.2013-02-282002Huber, P., O. G. Shpyrko, Peter S. Pershan, B. M. Ocko, E. DiMasi, and M. Deutsch. 2002. Tetra point wetting at the free surface of liquid Ga-Bi. Physical Review Letters 89(3): 035502.0031-9007http://nrs.harvard.edu/urn-3:HUL.InstRepos:10356595A 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.en-USJournal Article10.1103/PhysRevLett.89.035502