Complex materials are composed of basic units which invariably interact with anharmonic
potentials. It is well known that the dynamics of systems with anharmonic interaction are …

The lack of ultimate scaling relations for previtreous changes of the primary relaxation time
or viscosity in glass-forming systems constitutes the grand fundamental challenge, also …

It is generally agreed upon that the primary or the structural-relaxation involving
reorientation of larger angles and/or translation of sizeable distances is the most important …

An intriguing problem in condensed matter physics is understanding the glass transition, in
particular the dynamics in the equilibrium liquid close to vitrification. Recent advances have …

For glass-forming substances, we show that the ratio E β/RT g can be predicted
quantitatively from the coupling model. Here E β is the glassy state activation enthalpy of the …

The molecular mobility of amorphous ibuprofen has been investigated by broadband
dielectric relaxation spectroscopy (DRS) covering a temperature range of more than 200 K …

We report experimental evidence for the existence of Johari− Goldstein (JG) relaxation in
metallic glass formers. By using the hyperquenching− annealing− calorimetric approach, we …

The dynamics of molecular liquids and polymers exhibit various “transitions”, associated
with characteristic changes in properties. With decreasing temperature or increasing …

When a liquid is cooled below its melting temperature, if crystallization is avoided, it forms a
glass. This phenomenon, called glass transition, is characterized by a marked increase of …

The term dielectric analysis (DEA) refers to a group of techniques that measure changes in
different physical properties of a polar material, such as polarization, permittivity, and …