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.
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.
Pressure versus temperature locations of liquid-liquid and liquid-gas critical points (squares), and the maximum temperature of the TMD locus (circles), for potentials .
Pair entropy versus density for the cases A, B, C, and D for various temperatures.
Pair entropy versus density for the cases A, B, C, and D at T* = 0.9.
Diffusion in Rosenfeld units as a function of for the cases , and .
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.
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.
Parameters h 1 for potentials A, B, C, and D.
Parameters for potentials A, B, C, and D in units of Å and of .
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