Calcium Rubidium Nitrate: Mode-Coupling β Scaling without Factorization
Goldammer, M. · Losert, C. · Wuttke, J. · Petry, W. · Terki, F. · Schober, H. · Lunkenheimer, P.
Original · EN
The fast dynamics of viscous calcium rubidium nitrate is investigated by depolarized light scattering, neutron scattering and dielectric loss. Fast β relaxation evolves as in calcium potassium nitrate. The dynamic susceptibilities can be described by the asymptotic scaling law of mode-coupling theory with a shape parameter λ= 0.79; the temperature dependence of the amplitudes extrapolates to Tc≃ 378 K. However, the frequencies of the minima of the three different spectroscopies never coincide, in conflict with the factorization prediction, indicating that the true asymptotic regime is unreachable.
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