The vestige of many-body dynamics in relaxation of glass-forming substances and other interacting systems

by: KL Ngai

Philosophical Magazine, Vol. 87, No. 3-5. (February 2007), pp. 357-370.

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Abstract

Relaxation and diffusion in interacting systems including most glass-forming substances involve many-body dynamics. The stretch exponent, n, in the Kohlrasuch correlation function, ðtÞ ¼ exp½ðt=Þ1n, is a convenient measure of the many-body relaxation dynamics. Evidences of the importance of the manybody dynamics can be seen from the empirical facts that n either governs or correlates with several general relaxation properties. Two examples of this scenario are shown. The first is the ageing of colloidal glasses. The second is the breakdown of the Stokes–Einstein and the Debye–Stokes–Einstein relations in small molecular glass formers, colloidal particle suspensions and a Lennard-Jones system with rotational degree of freedom. The coupling model has a relation in which n plays a pivotal role in determining relaxation properties. The relation is used once more to explain the findings of the two examples given in this paper.

@article{citeulike:2959569, abstract = {Relaxation and diffusion in interacting systems including most glass-forming substances involve many-body dynamics. The stretch exponent, n, in the Kohlrasuch correlation function, ðtÞ ¼ exp½ðt=Þ1n, is a convenient measure of the many-body relaxation dynamics. Evidences of the importance of the manybody dynamics can be seen from the empirical facts that n either governs or correlates with several general relaxation properties. Two examples of this scenario are shown. The first is the ageing of colloidal glasses. The second is the breakdown of the Stokes–Einstein and the Debye–Stokes–Einstein relations in small molecular glass formers, colloidal particle suspensions and a Lennard-Jones system with rotational degree of freedom. The coupling model has a relation in which n plays a pivotal role in determining relaxation properties. The relation is used once more to explain the findings of the two examples given in this paper.}, author = {Ngai, K. L. }, citeulike-article-id = {2959569}, journal = {Philosophical Magazine}, keywords = {colloidal, molecular, theory}, month = {February}, number = {3-5}, pages = {357--370}, posted-at = {2008-07-07 17:57:57}, priority = {4}, title = {The vestige of many-body dynamics in relaxation of glass-forming substances and other interacting systems}, volume = {87}, year = {2007} }

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TY - JOUR ID - citeulike:2959569 L3 - citeulike-article-id:2959569 TI - The vestige of many-body dynamics in relaxation of glass-forming substances and other interacting systems JF - Philosophical Magazine VL - 87 IS - 3-5 SP - 357 EP - 370 N2 - Relaxation and diffusion in interacting systems including most glass-forming substances involve many-body dynamics. The stretch exponent, n, in the Kohlrasuch correlation function, ðtÞ ¼ exp½ðt=Þ1n, is a convenient measure of the many-body relaxation dynamics. Evidences of the importance of the manybody dynamics can be seen from the empirical facts that n either governs or correlates with several general relaxation properties. Two examples of this scenario are shown. The first is the ageing of colloidal glasses. The second is the breakdown of the Stokes–Einstein and the Debye–Stokes–Einstein relations in small molecular glass formers, colloidal particle suspensions and a Lennard-Jones system with rotational degree of freedom. The coupling model has a relation in which n plays a pivotal role in determining relaxation properties. The relation is used once more to explain the findings of the two examples given in this paper. KW - colloidal KW - molecular KW - theory AU - Ngai, KL PY - 2007/02// ER -

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