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DY: Fachverband Dynamik und Statistische Physik
DY 33: Critical Phenomena and Phase Transitions
DY 33.10: Talk
Wednesday, March 18, 2015, 17:30–17:45, BH-N 334
Thermodynamic properties of two-dimensional colloidal crystals with dipolar interactions — •Sven Deutschländer1, Tobias Horn2, Antonio Manuel Puertas3, Hartmut Löwen2, Georg Maret1, and Peter Keim1 — 1University of Konstanz, Konstanz, Germany — 2Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany — 3University of Almeria, Almeria, Spain
Colloidal suspensions provide the possibility to study a variety of classical many particle systems like glasses, gels, crystals or liquids on a microscopic scale by means of single particle resolution. Hence, macroscopically significant thermal and mechanical properties can be reasoned by the explicit structure and dynamics of the particles. By colloidal experiments and Monte Carlo simulations, we study the equilibrium melting scenario of two-dimensional systems with a repulsive dipole-dipole potential. Our results are largely in agreement with theoretical predictions of the continuous KTHNY melting scenario, but also indicate new prospects which are beyond the microscopic defect theory.
[1] S. Deutschländer, A. M. Puertas, G. Maret, and P. Keim, Phys. Rev. Lett. 113, 127801 (2014). [2] S. Deutschländer, T. Horn, H. Löwen, G. Maret, and P. Keim, Phys. Rev. Lett. 111, 098301 (2013). [3] T. Horn, S. Deutschländer, H. Löwen, G. Maret, and P. Keim, Phys. Rev. E 88, 062305 (2013)