Dimensionality effects in dipolar fluids

Details Dimensionality effects in dipolar fluids Dimensionality effects in dipolar fluids

2010-12-03

arxiv.org/abs/1012.0677v2

Physics

Condensed Matter

Statistical Mechanics

7 pages, 2 figures

Scientific paper

Using classical density functional theory (DFT) in a modified mean-field approximation we investigate the fluid phase behavior of quasi-two dimensional dipolar fluids confined to a plane. The particles carry three-dimensional dipole moments and interact via a combination of hard-sphere, van-der-Waals, and dipolar interactions. The DFT predicts complex phase behavior involving first- and second-order isotropic-to-ferroelectric transitions, where the ferroelectric ordering is characterized by global polarization within the plane. We compare this phase behavior, particularly the onset of ferroelectric ordering and the related tricritical points, with corresponding three-dimensional systems, slab-like systems (with finite extension into the third direction), and true two-dimensional systems with two-dimensional dipole moments.

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