Hannover 2010 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 23: Poster II

A 23.28: Poster

Donnerstag, 11. März 2010, 16:30–19:00, Lichthof

Phase diagram of spatially indirect excitons with an effective interaction potential — •Jens Böning, Alexei Filinov, Patrick Ludwig, and Michael Bonitz — Institut für Theoretische Physik und Astrophysik, Christian-Albrechts-Universität, Leibnizstr. 15, D-24098 Kiel, Germany

We derive an effective interaction potential for spatially indirect excitons in quantum well structures [1]. Using this potential and path integral Monte Carlo simulations, we study exciton crystallization and the quantum melting phase transition in a macroscopic system of 2D excitons. Furthermore, the superfluid fraction is calculated as a function of density and is shown to vanish upon crystallization.

[1] A Filinov et al. J. Phys. A: Math. Theor. 42, 214016 (2009)