Propylene Carbonate Reexamined: Mode-Coupling $β$ Scaling without Factorisation ?

Details Propylene Carbonate Reexamined: Mode-Coupling $β$ Scaling without Factorisation ? Propylene Carbonate Reexamined: Mode-Coupling $β$ Scaling without Factorisation ?

1999-08-31

arxiv.org/abs/cond-mat/9908476v1

Phys. Rev. E 61, 2730 (2000)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1103/PhysRevE.61.2730

The dynamic susceptibility of propylene carbonate in the moderately viscous regime above $T_{\rm c}$ is reinvestigated by incoherent neutron and depolarised light scattering, and compared to dielectric loss and solvation response. Depending on the strength of $\alpha$ relaxation, a more or less extended $\beta$ scaling regime is found. Mode-coupling fits yield consistently $\lambda=0.72$ and $T_{\rm c}=182 $K, although different positions of the susceptibility minimum indicate that not all observables have reached the universal asymptotics.

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