High-frequency dynamics of type B glass formers investigated by broadband dielectric spectroscopy |
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| Authors: | S Kastner Y Goncharov A Loidl |
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| Institution: | a Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germanyb Institute of General Physics, Russian Academy of Sciences, 119991 Moscow, Russia |
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| Abstract: | We present the results of broadband dielectric spectroscopy on two glass formers with strong Johari-Goldstein β-relaxations. In addition to the α- and β-relaxation dynamics, the extension of the spectra up to 1 THz also allows revealing information on the fast β-process in this class of materials. There is clear evidence for a fast process contributing in the region of the high-frequency loss minimum, which is analyzed in terms of the idealized mode-coupling theory. |
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| Keywords: | Dielectric relaxation Supercooled liquids Glassy dynamics |
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