Hannover 2010 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 7: Poster: Dusty Plasmas

P 7.3: Poster

Dienstag, 9. März 2010, 16:00–18:00, Lichthof

Melting in small size Yukawa clusters — •Hauke Thomsen, Jens Böning, and Michael Bonitz — Institut für Theoretische Physik und Astrophysik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany

We investigate a confined system with a small number (around 10 to 100) of classical particles. The interaction between the particles is screened and is described by a Yukawa potential. The trapped particles form clusters (Yukawa balls). To detect melting of those clusters we calculate the specific heat and Lindemann-type parameters [1] by Monte Carlo simulations [2]. To overcome longtime correlation we use the technique of parallel tempering. A general trend is that for fixed particle number the critical temperature decreases with increasing screening.

[1] J. Böning et al., Phys. Rev. Lett. 100, 113401 (2008)

[2] M. Bonitz, D. Semkat (eds.): Introduction to Computational Methods in Many Body Physics