A universal description of ultraslow glass dynamics

García, Jaime; Rzoska, Sylwester J.; Drozd-Rzoska, Aleksandra; Martinez-Garcia, Jorge

doi:10.1038/ncomms2797

Cited by 61 publications

(125 citation statements)

References 54 publications

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“…It is an obvious, but controversially debated approach to trace these deviations back to a temperature-dependent apparent activation energy, strongly increasing towards low temperatures (Fig. 2(b) with inset) [1,3,4,5,47,48]. Such a behaviour may arise from an increase in cooperativity of molecular motions when the glass transition is approached [1,3,49,50].…”

Section: Glassy Dynamics As Revealed By Linear Dielectric Spectroscopymentioning

confidence: 99%

Investigation of nonlinear effects in glassy matter using dielectric methods

Lunkenheimer

Michl

Bauer

et al. 2017

Eur. Phys. J. Spec. Top.

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Abstract. We summarize current developments in the investigation of glassy matter using nonlinear dielectric spectroscopy. This work also provides a brief introduction into the phenomenology of the linear dielectric response of glassforming materials and discusses the main mechanisms that can give rise to nonlinear dielectric response in this material class. Here we mainly concentrate on measurements of the conventional dielectric permittivity at high fields and the higher-order susceptibilities characterizing the 3 and 5 components of the dielectric response as performed in our group. Typical results on canonical glass-forming liquids and orientationally disordered plastic crystals are discussed, also treating the special case of supercooled monohydroxy alcohols.

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Section: Glassy Dynamics As Revealed By Linear Dielectric Spectroscopymentioning

confidence: 99%

Investigation of nonlinear effects in glassy matter using dielectric methods

Lunkenheimer

Michl

Bauer

et al. 2017

Eur. Phys. J. Spec. Top.

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“…The behavior of χ is related to the viscosity change and Qiao's work shows that the quality of the fitting depends on an appropriate description of the viscosity behavior. However, due to the many orders of magnitude change within a relatively narrow temperature region, the description of viscosity behavior is still an open problem [4,107,108]. Wang [109] showed that the DMA behavior can be fitted in the whole temperature range by coupling two KWW equations in Fourier transforms.…”

Section: Modeling Of the Mechanical Relaxation Spectrummentioning

confidence: 99%

Mechanical Relaxation of Metallic Glasses: An Overview of Experimental Data and Theoretical Models

Liu

Pineda

Crespo

2015

Metals

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Relaxation phenomena in glasses are a subject of utmost interest, as they are deeply connected with their structure and dynamics. From a theoretical point of view, mechanical relaxation allows one to get insight into the different atomic-scale processes taking place in the glassy state. Focusing on their possible applications, relaxation behavior influences the mechanical properties of metallic glasses. This paper reviews the present knowledge on mechanical relaxation of metallic glasses. The features of primary and secondary relaxations are reviewed. Experimental data in the time and frequency domain is presented, as well as the different models used to describe the measured relaxation spectra. Extended attention is paid to dynamic mechanical analysis, as it is the most important technique allowing one to access the mechanical relaxation behavior. Finally, the relevance of the relaxation behavior in the mechanical properties of metallic glasses is discussed.

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“…The new “model free” approach, explores the reciprocal of the Dyre-Olsen (DO) activation energy temperature index 1/ I DO = [− d lnΔ E a / d ln T ] −1 , where Δ E a ( T ) defines the temperature-dependent apparent activation energy23. A preference for parameterization with the finite-temperature divergence is clearly shown and the novel metric characterizing arbitrary glass former is proposed2324.…”

mentioning

confidence: 99%

Divergent dynamics and the Kauzmann temperature in glass forming systems

García

Rzoska

Drzozd-Rzoska

et al. 2014

Sci Rep

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In the last decade the challenging analysis of previtreous behavior of relaxation time (τ(T)) in ultraviscous low molecular weight liquids led to the conceptual shift of the glass transition physics toward theories not predicting a “finite-temperature” divergence. This “breakthrough” experimental finding was strengthened by the discovery that “dynamic” (i.e. from τ(T) fitting) and “thermodynamic” estimations of the “ideal glass” (Kauzmann) temperature do not match, what in fact questioned its existence. In this report, due to the novel way of analysis based on the transformation of τ(T) experimental data to the activation energy temperature index form, the clear prevalence of the “finite-temperature” divergence is proved. The obtained “dynamic” singular temperatures clearly coincide with “thermodynamic” estimations of the Kauzmann temperature, thus solving also the second mystery. The comprehensive picture was obtained due to the analysis of 55 experimental data-sets, ranging from low molecular weight liquids and polymers to liquid crystal and plastic crystals.

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A universal description of ultraslow glass dynamics

Cited by 61 publications

References 54 publications

Investigation of nonlinear effects in glassy matter using dielectric methods

Investigation of nonlinear effects in glassy matter using dielectric methods

Mechanical Relaxation of Metallic Glasses: An Overview of Experimental Data and Theoretical Models

Divergent dynamics and the Kauzmann temperature in glass forming systems

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