Fermi-Jagla model

The Fermi-Jagla model is a smooth variant of the Jagla model. It is given by (Eq. 1 in ):

${\mathrm{\Phi }}_{12}(r)={ϵ}_0[{(\frac{a}{r})}^n+\frac{A_0}{1+\exp [\frac{A_1}{A_0}\frac{r}{a-A_2}]}-\frac{B_0}{1+\exp [\frac{B_1}{B_0}\frac{r}{a-B_2}]}]$

There is a relation between Fermi function and hyperbolic tangent:

$\frac{1}{1+e^x}=\frac{1}{2}-\frac{1}{2}tanh(x/2)$

Using this relation one can deduce Fermi-Jagla model to Fomin potential introduced earlier and described in another section of this site.

References

Related reading

• Shaina Reisman and Nicolas Giovambattista "Glass and liquid phase diagram of a polyamorphic monatomic system", Journal of Chemical Physics 138 064509 (2013)