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An analysis of fluctuations in supercooled TIP4P/2005 water
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10.1063/1.4803868
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Affiliations:
1 Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
J. Chem. Phys. 138, 184502 (2013)
/content/aip/journal/jcp/138/18/10.1063/1.4803868
http://aip.metastore.ingenta.com/content/aip/journal/jcp/138/18/10.1063/1.4803868
View: Figures

## Figures

FIG. 1.

The long-time part of the intermediate self-scattering function, (, ), at = 18.6 nm for temperatures indicated in the legend (top) and mean-squared displacements for different temperatures as indicated in the legend (bottom).

FIG. 2.

Normalized probability distribution function of the order parameter (Eq. ), for different temperatures obtained with ρ = 1.012 g/cm. Vertical lines show the median values for 193 and 240 K.

FIG. 3.

Partial oxygen-oxygen pair correlation functions, () (top panel), () (2nd panel), () (3rd panel), and the total pair correlation function, () (bottom panel), for 193 K (red), 195 K (black), 200 K (yellow), and 240 K (dark blue).

FIG. 4.

Density-density, (), concentration-concentration, (), and density-concentration, (), structure factors for different temperatures as denoted in the legend.

FIG. 5.

The functions () (thick lines) and θ() (thin lines), at small wave number, for different temperatures as denoted in the legend.

FIG. 6.

The isothermal compressibility, κ, and . provides a measure of the structure factor in the absence of concentration fluctuations. The error bars represent estimated standard deviations, which are smaller than the symbols for .

FIG. 7.

The functions 1/ () and 1/ () with , along with fits (lines) to Eq. , for the temperatures denoted in the legend.

FIG. 8.

Correlation lengths, ξ obtained from Eq. , along with fits (lines) to Eq. . The black and red curves are as denoted in the legend. The error bars represent estimated standard deviations.

FIG. 9.

Density distributions obtained at 1400 bar and 191 K, initially started from a density of ρ = 1.000 g/cm, calculated over different 500 ns time windows. Density distribution shapes and average densities calculated from different time windows vary significantly.

FIG. 10.

Density distributions obtained at 1400 bar and 191 K with 500 (top panel), 8000 (middle panel), and 32 000 (bottom panel) molecules. In all panels, density distributions from two different simulations are shown, one started with ρ = 1.000 g/cm (black) and the other with ρ = 1.029 g/cm. The average density distribution from the two runs is also shown. Simulation times, excluding equilibration, are given in the legend.

FIG. 11.

Density distributions obtained at 1450 bar and 191 K with 500 (top panel), 8000 (middle panel), and 32 000 (bottom panel) molecules. In the top two panels, density distributions from two different simulations are shown, one started at lower density, either ρ = 1.000 g/cm (for 8000 molecules), or ρ = 1.012 g/cm (for 500 molecules), and the other with ρ = 1.029 g/cm. The average density distribution from the two runs is also shown. Simulation times, excluding equilibration, are given in the legend.

/content/aip/journal/jcp/138/18/10.1063/1.4803868
2013-05-09
2014-04-17

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