The hard core Yukawa potential has two forms, the attractive Yukawa potential:
and the repulsive form
where is the intermolecular pair potential, is the distance between site 1 and site 2,
is the hard diameter, is the energy well depth (), and
is a parameter that controls the interaction range ().
The repulsive form has been used to study charge-stabilised colloid-colloid interactions.
Critical point
For the attractive form of the potential, from a study of the law of corresponding states, one has (Ref. 1 Eq. 3)
and (Ref. 1 Eq. 4)
- .
The repulsive form of the potential has no critical point.
Triple points
- Fouad El Azhar, Marc Baus, Jean-Paul Ryckaert and Evert Jan Meijer "Line of triple points for the hard-core Yukawa model: A computer simulation study", Journal of Chemical Physics 112 pp. 5121- (2000)
Phase diagram
- Main article: Phase diagram of the Yukawa potential
References
- Pedro Orea and Yurko Duda "On the corresponding states law of the Yukawa fluid", Journal of Chemical Physics 128 134508 (2008)