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Journal Article

Melting of anisotropic colloidal crystals in two dimensions


Keim,  P.
Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Eisenmann, C., Keim, P., Gasser, U., & Maret, G. (2004). Melting of anisotropic colloidal crystals in two dimensions. Journal of Physics: Condensed Matter, 16(38), S4095-S4102. doi:10.1088/0953-8984/16/38/024.

Cite as: https://hdl.handle.net/21.11116/0000-0009-8599-4
The crystal structure and melting transition of two-dimensional colloids interacting via an anisotropic magnetic dipole–dipole potential are studied. Anisotropy is achieved by tilting the external magnetic field inducing the dipole moments of the colloidal particles away from the direction perpendicular to the particle plane. We find a centred rectangular lattice and a two-step melting similar to the phase transitions of the corresponding isotropic crystals via a quasi-hexatic phase. The latter is broadened compared to the hexatic phase for isotropic interaction potential due to strengthening of orientational order.