Study of the Collective Density Fluctuations in Glass-Forming Liquids
This proposal was accepted under proposal number 6-05-1041, but was backlogged before the long shutdown. Hence the resubmission. Recent theoretical and computational studies have suggested that low energy collective modes with shear nature indeed, exist in liquids and are enhanced in glasses. Furthermore, the appearance of these modes in collective density fluctuations characterized by the coherent dynamic structure factor, is intimately related to the fragility of the liquids. Our recently developed ViscoElastic Hydrodynamic (VEH) theory predicts that the common origin of the anomalous low-energy excitations in strong liquids and collective fast relaxation in fragile liquids, is the manifestation of transverse collective modes. We have some preliminary experimental evidence of this on two glass- forming ionic compounds, K3Ca2(NO3)7 (CKN) and ZnCl2, fragile and strong glass formers respectively, from INS and NSE measurements. We now request WASP to measure the collective relaxation modes (both the slow and an additional fast mode) ZnCl2 over a wider Q range than previously achievable and further test our theory.
The data is currently only available to download if you are a member of the proposal team.
The recommended format for citing this dataset in a research publication is in the following format:
FALUS Peter; FARAONE Antonio; GARCIA SAKAI Victoria; HARTL Monika and Lucas Trojanowski. (2023). Study of the Collective Density Fluctuations in Glass-Forming Liquids. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-05-1066
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This data is not yet public
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