Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 114, Issue 20, Pages 9069-9074Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1367386
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A fluid mixture of hard discs is made glassy in a molecular dynamics experiment by permanently constraining each disc center to stay within a cage of three near neighbors. The constraints can be applied at any density and they cause a thermodynamic glass transition where the compressibility, heat capacity, and entropy decrease. The decrease in entropy provides a direct measure of the configurational entropy of the fluid. A relation between diffusivity and the configurational entropy suggested by Adam and Gibbs [J. Chem. Phys. 43, 139 (1965)] is shown to be accurate from the ideal gas to the kinetic glass transition. (C) 2001 American Institute of Physics.
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