Anomalous rotational relaxation: a fractional Fokker-Planck equation approach.
In this study we have analytically obtained the relaxation function in terms of rotational correlation functions based on Brownian motion for complex disordered systems in a stochastic framework. We found out that the rotational relaxation function has a fractional form for complex disordered systems, which indicates that relaxation has nonexponential character and obeys the Kohlrausch-William-Watts law, following the Mittag-Leffler decay.
Aydiner
Ekrem
E
Department of Physics, Faculty of Arts and Sciences, Dokuz Eylül University, Tr-35160 Buca, Izmir, Turkey. ekrem.aydiner@deu.edu.tr