Little evidence for dynamic divergences in ultraviscous molecular liquids

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Resumé

The physics of the ultraviscous liquid phase preceding glass formation continues to pose major problems that remain unsolved. It is actively debated, for instance, whether the marked increase of the relaxation time reflects an underlying phase transition to a state of infinite relaxation time. To elucidate the empirical evidence for this intriguing scenario, some of the most accurate relaxationtime data available for any class of ultraviscous liquids-those obtained by dielectric relaxation experiments on organic liquids just above the glass transition-were compiled. Analysis of data for 42 liquids shows that there is no compelling evidence for the Vogel-Fulcher-Tammann (VFT) prediction that the relaxation time diverges at a finite temperature.We conclude that theories with a dynamic divergence of the VFT formlack a direct experimental basis.
OriginalsprogEngelsk
TidsskriftNature Physics
Vol/bind4
Udgave nummer9
Sider (fra-til)737-741
Antal sider5
ISSN1745-2473
DOI
StatusUdgivet - 2008

Citer dette

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title = "Little evidence for dynamic divergences in ultraviscous molecular liquids",
abstract = "The physics of the ultraviscous liquid phase preceding glass formation continues to pose major problems that remain unsolved. It is actively debated, for instance, whether the marked increase of the relaxation time reflects an underlying phase transition to a state of infinite relaxation time. To elucidate the empirical evidence for this intriguing scenario, some of the most accurate relaxationtime data available for any class of ultraviscous liquids-those obtained by dielectric relaxation experiments on organic liquids just above the glass transition-were compiled. Analysis of data for 42 liquids shows that there is no compelling evidence for the Vogel-Fulcher-Tammann (VFT) prediction that the relaxation time diverges at a finite temperature.We conclude that theories with a dynamic divergence of the VFT formlack a direct experimental basis.",
author = "Tina Hecksher and Albena Nielsen and Olsen, {Niels Boye} and Dyre, {J. C.}",
year = "2008",
doi = "10.1038/nphys1033",
language = "English",
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Little evidence for dynamic divergences in ultraviscous molecular liquids. / Hecksher, Tina; Nielsen, Albena; Olsen, Niels Boye; Dyre, J. C.

I: Nature Physics, Bind 4, Nr. 9, 2008, s. 737-741.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Little evidence for dynamic divergences in ultraviscous molecular liquids

AU - Hecksher, Tina

AU - Nielsen, Albena

AU - Olsen, Niels Boye

AU - Dyre, J. C.

PY - 2008

Y1 - 2008

N2 - The physics of the ultraviscous liquid phase preceding glass formation continues to pose major problems that remain unsolved. It is actively debated, for instance, whether the marked increase of the relaxation time reflects an underlying phase transition to a state of infinite relaxation time. To elucidate the empirical evidence for this intriguing scenario, some of the most accurate relaxationtime data available for any class of ultraviscous liquids-those obtained by dielectric relaxation experiments on organic liquids just above the glass transition-were compiled. Analysis of data for 42 liquids shows that there is no compelling evidence for the Vogel-Fulcher-Tammann (VFT) prediction that the relaxation time diverges at a finite temperature.We conclude that theories with a dynamic divergence of the VFT formlack a direct experimental basis.

AB - The physics of the ultraviscous liquid phase preceding glass formation continues to pose major problems that remain unsolved. It is actively debated, for instance, whether the marked increase of the relaxation time reflects an underlying phase transition to a state of infinite relaxation time. To elucidate the empirical evidence for this intriguing scenario, some of the most accurate relaxationtime data available for any class of ultraviscous liquids-those obtained by dielectric relaxation experiments on organic liquids just above the glass transition-were compiled. Analysis of data for 42 liquids shows that there is no compelling evidence for the Vogel-Fulcher-Tammann (VFT) prediction that the relaxation time diverges at a finite temperature.We conclude that theories with a dynamic divergence of the VFT formlack a direct experimental basis.

U2 - 10.1038/nphys1033

DO - 10.1038/nphys1033

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VL - 4

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EP - 741

JO - Nature Physics

JF - Nature Physics

SN - 1745-2473

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