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Rayleigh-Brillouin light-scattering study of a simple glass former: evidence of locally favored structures

, : Rayleigh-Brillouin light-scattering study of a simple glass former: evidence of locally favored structures. Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics 82(1 Pt 1): 011503-011503

The Rayleigh-Brillouin light scattering is studied in the glass-forming picoline with emphasis to the temperature dependence of the Landau-Placzek ratio. It was found that the Landau-Placzek ratio is in good agreement with the theoretical prediction at T>T(A), where TA is the temperature of transition from an Arrhenius-like to a non-Arrhenius behavior for the α-relaxation time dependence on temperature. Below T(A) the Landau-Placzek ratio exceeds significantly the theoretical prediction. The finding is interpreted as the evidence of the locally favored structures, which presence in an equilibrium glass-forming liquid below T(A).


PMID: 20866621

DOI: 10.1103/PhysRevE.82.011503

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