Dresden 2006 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 1: Thin Films and Surfaces I

CPP 1.8: Vortrag

Montag, 27. März 2006, 11:45–12:00, ZEU Lich

Low-temperature structures of dipolar films — •Sabine H.L. Klapp — Stranski-Lab for Physical and Theoretical Chemistry, Sekr. C7, Technical University Berlin, Strasse des 17. Juni 115, 10623 Berlin — Institute for Theoretical Physics, Sekr. PN 7-1,Technical University Berlin, Hardenbergstrasse 36, 10623 Berlin

Recent theoretical and experimental research has demonstrated that fluids with dominant dipole-dipole interactions can display new, unexpected behavior such as self-assembly of the particles into dipolar chains, and crystallization into novel structures (1). In the present contribution we focus on the behavior of dipolar systems confined to thin films and in two spatial dimensions, a situation which is particularly important for colloidal systems with (ferro–)magnetic interactions and for thin magnetic films. Using lattice summations and density functional theory we analyze possible lattice structures as well as the fluid side of the phase diagram. We also present Monte Carlo data for thin dipolar fluid films with a thicknesses between one and two monolayers.

1) S. H. L. Klapp, J. Phys.: Condens. Matter 17, R525 (2005).