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28 March 2024
 
  » arxiv » 0811.3318

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Exciton-exciton interaction and biexciton formation in bilayer systems
R. M. Lee ; N. D. Drummond ; R. J. Needs ;
Date 20 Nov 2008
AbstractWe report quantum Monte Carlo calculations of biexciton binding energies in ideal two-dimensional bilayer systems with isotropic electron and hole masses. We have also calculated exciton-exciton interaction potentials, and pair distribution functions for electrons and holes in bound biexcitons. Comparing our data with results obtained in a recent study using a model exciton-exciton potential [C. Schindler and R. Zimmermann, Phys. Rev. B extbf{78}, 045313 (2008)], we find a somewhat larger range of layer separations at which biexcitons are stable. We find that individual excitons retain their identity in bound biexcitons for large layer separations.
Source arXiv, 0811.3318
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