Recent findings of structural glasses with extremely high kinetic and thermodynamic stability have attracted much attention. The question has been raised as to whether low-temperature “glassy anomalies” persist or not in these ultrastable glasses. To resolve previous contradictory results, for the first time, an ultrastable glass which can be prepared with different degrees of layering and molecular orientation has been studied in a collaboration between IFIMAC, ICMM and UAB researchers. Whereas the conventional glass exhibits the typical glassy behaviour, a strong depletion of the TLS contribution is found in both kinds of ultrastable glasses. [Full article]
