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Binary Disks
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1) Melting of binary phase-separated hard-disk crystal:
phi=0.775 (melting is incomplete)
LSD.HS.bi.2D.N=4096.crystal.expansion=2to0E-8.phi=0.775.melting.mng
phi=0.763 (melting is complete but slow)
LSD.HS.bi.2D.N=4096.crystal.expansion=2to0E-8.phi=0.763.melting.mng

9) For binary hard disks phi~0.8 is the kinetic glass transition density, and relaxatio dynamics is very slow
LSD.HS.bi.2D.N=4096.Matern.R=1.nu=0.1.phi=0.8.relaxation.mng
but at density phi=0.775 the dynamics is liquid-like, with long-time diffusion and complete mixing (ergodicity?):
LSD.HS.bi.2D.N=4096.Matern.R=2.nu=0.1.phi=0.775.relaxation.mng

A partially-clustered (micro-segregated) nonequilibrium binary disk system at phi=0.8 is stable over long MD runs:
LSD.HS.bi.2D.N=4096.Matern.R=2.nu=1.0.phi=0.8.relaxation.mng
but at a density phi=0.775 it demixes completely (though slowly)
LSD.HS.bi.2D.N=4096.Matern.R=2.nu=1.0.phi=0.775.relaxation.mng

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Jamming
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2) A hard-disk packing was produced by freezing some of the disks (purple). It has a low density phi~0.84 and appears jammed at first sight. However, running MD reveals that it is not and an unjamming motion becomes apparent---the new jamming density is closer to phi~0.9
LSD.HS.mono.2D.frozen.unjamming.gif

3) A collectively jammed disk packing (with rattlers removed) is not strictly jammed, as apparent when running MD with a deformable unit cell (lattice vectors):
OHern.mono.2D.large.1.backbone.strict.unjamming.gif

5) A collectively jammed disk packing is stretched to make an ellipse packing. It is no longer jammed, as MD demonstrates
Pentagon.10.e=0.975.melting.gif

6) The strictly jammed triangular disk crystal is stretched to make an ellipse packing. It is no longer strictly jammed, since it can be continuously sheared:
Triangular.HE.large.animation.gif

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Dominos
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4) 
The density of a random domino tiling is slowly increased from liquid to jamming:
N=5000
LSD.SHE.mono.2D.alpha=2.0.exp=7.5.N=5000.a=1.0E-4.movie.gif
N=1250
LSD.SHE.mono.2D.alpha=2.0.exp=7.5.N=1250.a=1.0E-4.movie.gif
The density of a random domino tiling is slowly reduced from close packing to liquid densities using MD:
LSD.SHE.mono.2D.alpha=2.0.exp=7.5.N=5000.dominos.random.a=1.00E-4.movie.gif
A nematic domino tiling changes density from close packing to liquid:
LSD.SHE.mono.2D.alpha=2.0.exp=7.5.N=1250.dominos.alligned.a=1.00E-3.movie.gif

______________
MD
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7) Compressing monodisperse disks with a fixed unit cell produces nearly triangular polycrystalline packings with line deffects:
LSD.HS.2D.N=250.noPR.animation.gif
Including deformations of the unit cell (Parinello-Rahman-type MD) leads to perfect triangular packings with some vacancies:
LSD.HS.2D.N=250.PR.animation.gif

8) MD of hard-sphere FCC crystal (phi=0.70)
Demo.HS.3D.crystal.mpg
and of hard-sphere dense liquid (phi=0.49)
Demo.HS.3D.liquid.mpg
Also hard-disk crystal
Demo.HS.2D.crystal.mpg
and hard-disk liquid


____________________________________________


For presentation:

Unjamming:
LSD.HS.mono.2D.frozen.unjamming.gif

Dominos:
LSD.SHE.mono.2D.alpha=2.0.exp=7.5.N=1250.a=1.0E-4.movie.gif

Glassy dynamics:
DiskTrapping.MRJ.mng
DiskTrapping.random.mng
DiskTrapping.crystal.mng