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P: Fachverband Plasmaphysik

P 19: Poster: Theorie und Modellierung

P 19.8: Poster

Thursday, February 28, 2013, 14:00–16:00, Poster EG

Phase Diagram of Bilayer Electron-Hole Plasmas — Jens Schleede¹, •Alexey Filinov^2,3, Michael Bonitz², and Holger Fehske¹ — ¹Institute for Physics, Ernst-Moritz-Arndt Universität, Greifswald, Germany — ²Institute for Theoretical Physics and Astrophysics, Christian-Albrechts-Universität, Kiel, Germany — ³Joint Institute for High Temperatures RAS, Moscow, Russia

We investigate exciton bound-state formation and crystallization effects in two-dimensional electron-hole bilayers. Performing unbiased path integral Monte Carlo simulations all quantum and Coulomb correlation effects are treated on first principles. We analyze diverse structural properties in dependence on the layer separation, particle density and hole-to-electron mass ratio and derive a schematic phase diagram for the neutral mass-asymmetric bilayer system. Our simulations reveal a great variety of possible phases namely an exciton gas, an exciton crystal, an electron-hole liquid and a hole crystal embedded in an electron gas.

[1] J. Schleede, A. Filinov, M. Bonitz, and H. Fehske, Contrib. Plasma Phys. 52, 819 (2012).