Scaling in the relaxation of supercooled liquids

Relationship between the Nonexponentiality of Relaxation and Relaxation Time in the Problem of Glass Transition

“…[7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] At each temperature, and τ were determined from the location and width of the dielectric loss peak, respectively. Prompted by our recent work on the glass transition, [24][25][26] we have plotted log(τ) as a function of 1/ .…”

Relaxational dynamics in the glassy, supercooled liquid, and orientationally disordered crystal phases of a polymorphic molecular material

“…20 Although this provides good fits for the main relaxation, the model function shows a clear deviation from the experimental data at higher frequencies. In particular, data for the imaginary part of the dielectric susceptibility lie systematically above the Cole-Davidson curves for all frequencies starting about two decades above the peak frequency.…”

Excess wing and Johari–Goldstein relaxation in binary mixtures of glass formers

“…Such a contribution appears as a power law with exponent smaller than that characterizing the high frequency part of the structural peak. The microscopic origin of the EW was debated and it was discussed whether it is a secondary peak submerged by the structural or it is a relaxation feature connected to the structural process [16][17][18][19][20][21][22][23][24][25][26][27]. In some cases the appearance of the EW is only a matter of a reduced frequency or temperature interval of investigation: by extending them it is observed that the EW becomes a secondary peak separated from the structural one [14,15,21].…”

“…Some articles discussed the origin of the EW proposing different interpretations. Early approaches interpreted the EW in the frame of the mode coupling theory, but without success [16], or, on the basis of scaling arguments, as an inherent part of the α-relaxation [17,18]. A new approach to the EW in term of the MCT was recently proposed [19] but not verified on the available data.…”