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Title: Universal scaling in the aging of the strong glass former SiO 2

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Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 144; Journal Issue: 23; Related Information: CHORUS Timestamp: 2016-12-26 16:42:38; Journal ID: ISSN 0021-9606
American Institute of Physics
Country of Publication:
United States

Citation Formats

Vollmayr-Lee, Katharina, Gorman, Christopher H., and Castillo, Horacio E.. Universal scaling in the aging of the strong glass former SiO 2. United States: N. p., 2016. Web. doi:10.1063/1.4953911.
Vollmayr-Lee, Katharina, Gorman, Christopher H., & Castillo, Horacio E.. Universal scaling in the aging of the strong glass former SiO 2. United States. doi:10.1063/1.4953911.
Vollmayr-Lee, Katharina, Gorman, Christopher H., and Castillo, Horacio E.. 2016. "Universal scaling in the aging of the strong glass former SiO 2". United States. doi:10.1063/1.4953911.
title = {Universal scaling in the aging of the strong glass former SiO 2},
author = {Vollmayr-Lee, Katharina and Gorman, Christopher H. and Castillo, Horacio E.},
abstractNote = {},
doi = {10.1063/1.4953911},
journal = {Journal of Chemical Physics},
number = 23,
volume = 144,
place = {United States},
year = 2016,
month = 6

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Publisher's Version of Record at 10.1063/1.4953911

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  • We show that the aging dynamics of a strong glass former displays a strikingly simple scaling behavior, connecting the average dynamics with its fluctuations, namely, the dynamical heterogeneities. We perform molecular dynamics simulations of SiO{sub 2} with van Beest-Kramer-van Santen interactions, quenching the system from high to low temperature, and study the evolution of the system as a function of the waiting time t{sub w} measured from the instant of the quench. We find that both the aging behavior of the dynamic susceptibility χ{sub 4} and the aging behavior of the probability distribution P(f{sub s,r}) of the local incoherent intermediatemore » scattering function f{sub s,r} can be described by simple scaling forms in terms of the global incoherent intermediate scattering function C. The scaling forms are the same that have been found to describe the aging of several fragile glass formers and that, in the case of P(f{sub s,r}), have been also predicted theoretically. A thorough study of the length scales involved highlights the importance of intermediate length scales. We also analyze directly the scaling dependence on particle type and on wavevector q and find that both the average and the fluctuations of the slow aging dynamics are controlled by a unique aging clock, which is not only independent of the wavevector q, but is also the same for O and Si atoms.« less
  • The dynamics of density fluctuations in arsenic trioxide has been investigated by Brillouin and photon correlation spectroscopy over the broad temperature range of 370{endash}770 K. Over overlapping temperature ranges, a fast secondary and slow primary ({alpha}) relaxation were clearly resolved with a time separation of about ten orders in magnitude. The former observed in the GHz frequency range appears to be of a different origin from the {beta} relaxation that is usually probed by dielectric spectroscopy in the glassy state. Conformational transitions between specific liquid structures are evoked to rationalize these fast density fluctuations in the supercooled amorphous state. {copyright}more » {ital 1996 The American Physical Society.}« less
  • carolyn BRODIN, B{umlt O}RJESSON, ENGBERG, TORELL, AND SOKOLOV RELAXATIONAL AND VIBRATIONAL DYNAMICS IN... The structural relaxation behavior of a strong glass former B{sub 2}O{sub 3} has been investigated over broad temperature (300{endash}1275 K) and frequency (0.5 GHz{endash}10 THz) ranges using depolarized light scattering. The spectra clearly show nonmonotonic temperature behavior with some dynamical crossover at about {ital T}{sub {ital c}}{approx_equal}800{endash}900 K. Above {ital T}{sub {ital c}} the spectra develop qualitatively according to the general scenario predicted by the mode-coupling theory (MCT), including a fast {beta} process and a much slower {alpha} process in addition to a vibrational contribution. However, theremore » is disagreement between the observed functional form of the fast relaxational dynamics and that predicted by MCT. The disagreement seems to be related to the influence of low-lying vibrational contributions, the so-called boson peak, which generally seems to be more pronounced in strong glass formers. Below {ital T}{sub {ital c}} the spectra do not follow MCT predictions, not even qualitatively; the main signature is a decrease of the level of the fast relaxation spectrum. Analysis in terms of an alternative phenomenological approach, in which the fast relaxation contribution is related to the damping of the vibrational modes (giving rise to the boson peak), reveals some crossover of the damping rate at about the same temperature {ital T}{sub {ital c}} as the crossover of the fast relaxation dynamics itself, and with similar temperature dependence as that recently reported for the Brillouin linewidth. We suggest that these variations are related to the temperature dependence of the relative strength of the fast relaxation. (Abstract Truncated)« less
  • Scaling laws of strong plasma turbulence are obtained with the aid of similarity transfomation of physical parameters in the Bogoliubov-Born-Green- Kirkwood-Yvon hierarchy equations. Fossible existence of a universal spectrum proportional to k/sup -a/ is discussed. The scaling arguments are extended to the analysis of the rate of turbulent heating and the anomalous resistivity. It is also shown that the scaling laws are useful in resolving an apparent paradox in the interpretation of the Crab pulser spectrum. (auth)
  • We have made ac complex resistivity measurements from 100 Hz to 5 MHz in the linear regime, as well as dc resistivity measurements, for a thick indium film in constant magnetic fields B. At B=0.1T, the vortex-glass transition temperature T{sub g} can be defined from the frequency-independent phase of the ac resistivity, which is in good accordance with the value determined independently from dc measurements. Critical exponents ({nu}{approximately}1.4, z{approximately}8) extracted from both dc and ac measurements are consistent. In addition to the vortex-correlation length {xi}{sub g}(T), the vortex-relaxation time {tau}{sub g}(T) is directly obtained from the frequency dependence of themore » ac resistivity. Within a limited critical regime ({vert_bar}T{minus}T{sub g}{vert_bar}{approximately}0.1K) about the phase transition, the amplitude and phase of the ac resistivity as well as the dc resistivity follow the universal scaling functions, which resemble those found in YBa{sub 2}Cu{sub 3}O{sub 7}. In B=1T, we have observed the similar scaling behavior for the dc resistivity to that in B=0.1T, whereas degradation of the scaled isotherms is visible for the ac resistivity. Although this problem still awaits further studies, all of these findings offer strong experimental evidence for the second-order transition in indium films. {copyright} {ital 1997} {ital The American Physical Society}« less