Spectrum of fast dynamics in glass forming liquids: Does the "knee" exist?

J. Gapiński; W. Steffen; A. Patkowski; A. P. Sokolov; A. Kisliuk; U. Buchenau; M. Russina; F. Mezei; H. Schober

doi:10.1063/1.477966

Spectrum of fast dynamics in glass forming liquids: Does the "knee" exist?

J. Gapiński
, W. Steffen
, A. Patkowski
, A. P. Sokolov
, A. Kisliuk
, U. Buchenau
, M. Russina
, F. Mezei
, H. Schober

Research output: Contribution to journal › Article › peer-review

76 Scopus citations

Abstract

A knee-shaped feature observed earlier in light scattering spectra of Ca_0.4K_0.3(NO₃)_1.4 (CKN) below T_c is used as a strong argument in favor of mode-coupling theory of the glass transition (MCT). Our careful measurements reveal no "knee" in the spectra of two glass forming liquids, CKN and ortho-terphenyl. Instead of the knee the spectra show nontrivial broadening and an increase of the intensity with a temperature increase. Both variations are confirmed by neutron scattering measurements on CKN and are neither expected in the asymptotic MCT predictions nor in any other model.

Original language	English
Pages (from-to)	2312-2315
Number of pages	4
Journal	Journal of Chemical Physics
Volume	110
Issue number	5
DOIs	https://doi.org/10.1063/1.477966
State	Published - Feb 1 1999
Externally published	Yes

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title = "Spectrum of fast dynamics in glass forming liquids: Does the {"}knee{"} exist?",

abstract = "A knee-shaped feature observed earlier in light scattering spectra of Ca0.4K0.3(NO3)1.4 (CKN) below Tc is used as a strong argument in favor of mode-coupling theory of the glass transition (MCT). Our careful measurements reveal no {"}knee{"} in the spectra of two glass forming liquids, CKN and ortho-terphenyl. Instead of the knee the spectra show nontrivial broadening and an increase of the intensity with a temperature increase. Both variations are confirmed by neutron scattering measurements on CKN and are neither expected in the asymptotic MCT predictions nor in any other model.",

author = "J. Gapi{\'n}ski and W. Steffen and A. Patkowski and Sokolov, \{A. P.\} and A. Kisliuk and U. Buchenau and M. Russina and F. Mezei and H. Schober",

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T1 - Spectrum of fast dynamics in glass forming liquids

T2 - Does the "knee" exist?

AU - Gapiński, J.

AU - Steffen, W.

AU - Patkowski, A.

AU - Sokolov, A. P.

AU - Kisliuk, A.

AU - Buchenau, U.

AU - Russina, M.

AU - Mezei, F.

AU - Schober, H.

PY - 1999/2/1

Y1 - 1999/2/1

N2 - A knee-shaped feature observed earlier in light scattering spectra of Ca0.4K0.3(NO3)1.4 (CKN) below Tc is used as a strong argument in favor of mode-coupling theory of the glass transition (MCT). Our careful measurements reveal no "knee" in the spectra of two glass forming liquids, CKN and ortho-terphenyl. Instead of the knee the spectra show nontrivial broadening and an increase of the intensity with a temperature increase. Both variations are confirmed by neutron scattering measurements on CKN and are neither expected in the asymptotic MCT predictions nor in any other model.

AB - A knee-shaped feature observed earlier in light scattering spectra of Ca0.4K0.3(NO3)1.4 (CKN) below Tc is used as a strong argument in favor of mode-coupling theory of the glass transition (MCT). Our careful measurements reveal no "knee" in the spectra of two glass forming liquids, CKN and ortho-terphenyl. Instead of the knee the spectra show nontrivial broadening and an increase of the intensity with a temperature increase. Both variations are confirmed by neutron scattering measurements on CKN and are neither expected in the asymptotic MCT predictions nor in any other model.

UR - https://www.scopus.com/pages/publications/0346704263

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DO - 10.1063/1.477966

M3 - Article

AN - SCOPUS:0346704263

SN - 0021-9606

VL - 110

SP - 2312

EP - 2315

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

IS - 5

ER -

Spectrum of fast dynamics in glass forming liquids: Does the "knee" exist?

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