2015/12/01 by U. Buchenau, Buchenau, U.
Chemical Engineering · Materials Science · Physics and Astronomy · #Disordered Systems and Neural Networks (cond-mat.dis-nn) #FOS: Physical sciences #Material Dynamics and Properties #Soft Condensed Matter (cond-mat.soft) #Spectroscopy and Quantum Chemical Studies #Thermodynamic properties of mixtures
paper · pdf · doi:10.48550/arxiv.1512.00188
openalex publication_date 2015/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The recently developed pragmatical model of asymmetric double-well potentials with a finite lifetime is applied to nonlinear dielectric data in polar undercooled liquids. The viscous effects from the finite lifetime provide a crossover from the cooperative jumps of many molecules at short times to the motion of statistically independent molecules at long times. The model allows to determine the size of cooperatively rearranging regions from nonlinear ω-data and throws a new light on a known inconsistency between nonlinear ω and 3ω-signals for glycerol and propylene carbonate.