Anisotropic mean-square displacements in two-dimensional colloidal crystals of tilted dipoles

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2005
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Froltsov, Vladimir
Likos, Christos N.
Löwen, Hartmut
Eisenmann, Christoph
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Physical Review E. 2005, 71(3). ISSN 1539-3755. Available under: doi: 10.1103/PhysRevE.71.031404
Zusammenfassung

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 Physik
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Colloids, Structure of bulk crystals
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ISO 690FROLTSOV, 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. 2005, 71(3). ISSN 1539-3755. Available under: doi: 10.1103/PhysRevE.71.031404
BibTex
@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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