Jena 2013 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 19: Poster: Theorie und Modellierung
P 19.8: Poster
Donnerstag, 28. Februar 2013, 14:00–16:00, Poster EG
Phase Diagram of Bilayer Electron-Hole Plasmas — Jens Schleede1, •Alexey Filinov2,3, 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).