Scaling of solvation force in 2D Ising strip

Details Scaling of solvation force in 2D Ising strip Scaling of solvation force in 2D Ising strip

2008-08-25

arxiv.org/abs/0808.3350v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1103/PhysRevE.78.060602

The solvation force for the 2D Ising strip is calculated via exact diagonalization of the transfer matrix in two cases: the symmetric case corresponds to identical surface fields, and the antisymmetric case to exactly opposite surface fields. In the symmetric case the solvation force is always negative (attractive) while in the antisymmetric case the solvation force is positive (repulsive) at high temperatures and negative at low temperatures. It changes sign close to the critical wetting temperature characterizing the semi--infinite system. The properties of the solvation force are discussed and the scaling function describing its dependence on temperature, surface field, and strip's width is proposed.

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