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Core-softened fluids, water-like anomalies, and the liquid-liquid critical points
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10.1063/1.3613669
/content/aip/journal/jcp/135/4/10.1063/1.3613669
http://aip.metastore.ingenta.com/content/aip/journal/jcp/135/4/10.1063/1.3613669

Figures

Image of FIG. 1.
FIG. 1.

Interaction potential obtained by changing parameters h 1 in Eq. (4). The potential and the distances are in dimensionless units U* = U/γ and r* = r/r 0.

Image of FIG. 2.
FIG. 2.

Pressure-temperature phase diagram for cases , , and D. The thin solid lines are the isochores 0.30 < ρ* < 0.65. The liquid-liquid critical point is the dot, the locus of temperatures of maximum density is the solid thick line and the locus of diffusion extrema is the dot-dashed line.

Image of FIG. 3.
FIG. 3.

Pressure versus temperature locations of liquid-liquid and liquid-gas critical points (squares), and the maximum temperature of the TMD locus (circles), for potentials .

Image of FIG. 4.
FIG. 4.

Pair entropy versus density for the cases A, B, C, and D for various temperatures.

Image of FIG. 5.
FIG. 5.

Pair entropy versus density for the cases A, B, C, and D at T* = 0.9.

Image of FIG. 6.
FIG. 6.

Diffusion in Rosenfeld units as a function of for the cases , and .

Image of FIG. 7.
FIG. 7.

Normal models versus frequency for the four studies cases. The density is fixed, ρ* = 0.50 in all the cases and the temperature is varied.

Image of FIG. 8.
FIG. 8.

Fraction of imaginary modes versus density for fixed temperatures, T* = 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, and 1.10 from bottom to top for cases and C. For case D temperature starts at T* = 0.50.

Tables

Generic image for table
Table I.

Parameters h 1 for potentials A, B, C, and D.

Generic image for table
Table II.

Parameters for potentials A, B, C, and D in units of Å and of .

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/content/aip/journal/jcp/135/4/10.1063/1.3613669
2011-07-29
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Core-softened fluids, water-like anomalies, and the liquid-liquid critical points
http://aip.metastore.ingenta.com/content/aip/journal/jcp/135/4/10.1063/1.3613669
10.1063/1.3613669
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