Akihiro Kushima et al 2009 J. Phys.: Condens. Matter 21 504104 doi:10.1088/0953-8984/21/50/504104
Akihiro Kushima1, Xi Lin2 and Sidney Yip1,3
Show affiliationsRecent progress in describing the viscosity of vitrified liquids through an effective temperature-dependent activation barrier offers a new look at the basis for classifying fragile and strong glasses. By considering the activated state kinetics of model fragile and strong liquids, we identify a common structure in the temperature variation of their activation barriers. A unified description is proposed in which all glass formers can exhibit strong and fragile behavior in principle, and correspondingly two strong–fragile dynamic crossovers are indicated. Our deductions are based only on atomistic calculations using specific interatomic interactions. Thus the results are model predictions subject to further studies and experimental confirmation. On the other hand, the justification for the method being used to obtain the effective activation barriers is based on a direct experimental test of the calculated viscosities.
66.20.-d Viscosity of liquids; diffusive momentum transport
64.70.P- Glass transitions of specific systems
Issue 50 (16 December 2009)
Received 1 June 2009, in final form 15 September 2009
Published 23 November 2009
Akihiro Kushima et al 2009 J. Phys.: Condens. Matter 21 504104
Li Ou et al 2009 J. Phys. G: Nucl. Part. Phys. 36 125104
Niklas Beisert and Peter Koroteev 2008 J. Phys. A: Math. Theor. 41 255204
David A Smith et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 125302
S H Yang et al 2008 Nanotechnology 19 245707
H-J Wiebicke et al 1998 Phys. Scr. 1998 29
Tomáš Tyc and Ulf Leonhardt 2008 New J. Phys. 10 115038
A U Klimyk and J Patera 2008 J. Phys. A: Math. Theor. 41 145205
R Jagannathan and J Van der Jeugt 1995 J. Phys. A: Math. Gen. 28 2819
I A B Strachan 1996 J. Phys. A: Math. Gen. 29 6117