PMID: 11909472Mar 23, 2002Paper

Dynamics of sodium in sodium disilicate: channel relaxation and sodium diffusion

Physical Review Letters
Jürgen HorbachKurt Binder

Abstract

We use molecular-dynamics computer simulations to study the dynamics of amorphous (Na2O)2(SiO2). We find that the Na ions move in channels embedded in a SiO2 matrix. The characteristic distance between these channels gives rise to a prepeak in the structure factor at q approximately equal to 0.95 A(-1). The dynamics of sodium is given by a fast process which can be seen in the incoherent scattering function and a slow process which is seen in the coherent function. The relaxation time of the latter coincides with the alpha-relaxation time of the matrix. The Kohlrausch exponent of the fast process for q>1.6 A(-1) is the same as the von Schweidler exponent for the slow one. Thus the two processes are closely related.

References

May 18, 1992·Physical Review Letters·P MaassM D Ingram

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Citations

Oct 9, 2007·The Journal of Chemical Physics·Hiroshi FukuiTatsuhiko Kawamoto
Sep 4, 2012·The Journal of Chemical Physics·Rémi BusselezBernhard Frick
Nov 10, 2006·The Journal of Chemical Physics·Angel J Moreno, Juan Colmenero
May 6, 2006·The Journal of Chemical Physics·Ivan Brovchenko, Alla Oleinikova
Dec 17, 2009·The Journal of Chemical Physics·Heiko LammertAndreas Heuer
Jul 23, 2004·The Journal of Chemical Physics·Anke WinklerKurt Binder
Dec 4, 2014·Soft Matter·Simon K SchnyderJürgen Horbach
May 20, 2014·Nature Communications·B RutaF Nazzani
May 21, 2005·Physical Chemistry Chemical Physics : PCCP·Magnus Kunow, Andreas Heuer
Oct 8, 2013·Physical Review Letters·Thomas O E SkinnerRoel P A Dullens
May 27, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Markus SpannerThomas Franosch
May 27, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Kang KimShinji Saito
Feb 27, 2016·Physical Review Letters·Markus SpannerThomas Franosch
Mar 29, 2014·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Cristian BalbuenaDaniel A Stariolo
Feb 27, 2021·Physical Review Letters·Zhen ZhangWalter Kob
Jul 13, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·F SacchettiB Dorner
Jul 16, 2014·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Simon Lang, Thomas Franosch
Apr 7, 2010·Physical Review Letters·Th Voigtmann, J Horbach
Apr 7, 2010·Physical Review Letters·Heiko Lammert, Andreas Heuer
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Aug 2, 2014·ACS Macro Letters·Mohammed Zakaria SlimaniAngel J Moreno
Jul 21, 2006·The Journal of Physical Chemistry. B·Antonio M PuertasMichael E Cates

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