Freezing of capillary waves at the glass transition

T. Seydel, M. Tolan, B. M. Ocko, O. H. Seeck, R. Weber, E. DiMasi, W. Press
2002 Physical Review B (Condensed Matter)  
The freezing of capillary waves on glycerol surfaces is studied by in situ x-ray reflectivity measurements. A wide temperature range around the calorimetric glass transition temperature at T g Ϸ186 K is investigated. For TϾ250 K the obtained surface roughness as a function of the temperature differs significantly from the value predicted by the classical capillary waves theory. Below the temperature TϷ250 K the magnitude of the roughness remains constant. Furthermore, a large hysteresis, i.e.,
more » ... large difference of the roughnesses measured during cooling and heating of the sample, is observed. These findings are discussed in terms of viscosity effects.
doi:10.1103/physrevb.65.184207 fatcat:mvzwi4wamfal7eqp2dqlpm3kfi