2008/04/21 by Sven van Teeffelen, Hartmut Löwen, Christos N. Likos
Chemistry · Engineering · Physics and Astronomy · #Characterization and Applications of Magnetic Nanoparticles #Chemistry #Condensed matter physics #Crystallization #Dipole #Magnetic properties of thin films #Materials science #Monolayer #Nanotechnology #Nuclear magnetic resonance #Organic chemistry #Physics #Theoretical and Computational Physics #Thermodynamics #cond-mat.soft #cond-mat.stat-mech
paper · pdf · doi:10.1088/0953-8984/20/40/404217
23 pages, 18 figures
arxiv created 2008/04/21 · openalex publication_date 2008/09/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract. We employ density functional theory to study in detail the crystallization of super-paramagnetic particles in two dimensions under the influence of an external magnetic field that lies perpendicular to the confining plane. The field induces nonfluctuating magnetic dipoles on the particles, resulting into an interparticle interaction that scales as the inverse cube of the distance separating them. In line with previous findings for long-range interactions in three spatial dimensions, we find that explicit inclusion of liquid-state structural information on the triplet correlations is crucial to yield theoretical predictions that agree quantitatively with experiment. A nonperturbative treatment is superior to the oft-employed functional Taylor expansions, truncated at second or third order. We go beyond the usual Gaussian parametrization of the density site-orbitals by performing free minimizations with respect to both the shape and the normalization of the profiles, allowing for finite defect concentrations. PACS numbers: 64.10.+h,64.70.Dv,82.70.Dd