Anisotropic mean-square displacements in two-dimensional colloidal crystals of tilted dipoles
Anisotropic mean-square displacements in two-dimensional colloidal crystals of tilted dipoles
Date
2005
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Froltsov, Vladimir
Likos, Christos N.
Löwen, Hartmut
Eisenmann, Christoph
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Physical Review E ; 71 (2005), 3. - ISSN 1539-3755
Abstract
Superparamagnetic colloidal particles confined to a flat horizontal air-water interface in an external magnetic field, which is tilted relative to the interface, form anisotropic two-dimensional crystals resulting from their mutual dipole-dipole interactions. Using real-space experiments and harmonic lattice theory we explore the mean-square displacements of the particles in the directions parallel and perpendicular to the in-plane component of the external magnetic field as a function of the tilt angle. We find that the anisotropy of the mean-square displacement behaves nonmonotonically as a function of the tilt angle and does not correlate with the structural anisotropy of the crystal.
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530 Physics
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Colloids,Structure of bulk crystals
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FROLTSOV, Vladimir, Christos N. LIKOS, Hartmut LÖWEN, Christoph EISENMANN, Urs GASSER, Peter KEIM, Georg MARET, 2005. Anisotropic mean-square displacements in two-dimensional colloidal crystals of tilted dipoles. In: Physical Review E. 71(3). ISSN 1539-3755. Available under: doi: 10.1103/PhysRevE.71.031404BibTex
@article{Froltsov2005Aniso-17104, year={2005}, doi={10.1103/PhysRevE.71.031404}, title={Anisotropic mean-square displacements in two-dimensional colloidal crystals of tilted dipoles}, number={3}, volume={71}, issn={1539-3755}, journal={Physical Review E}, author={Froltsov, Vladimir and Likos, Christos N. and Löwen, Hartmut and Eisenmann, Christoph and Gasser, Urs and Keim, Peter and Maret, Georg} }
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