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Exciton and biexciton energies in bilayer systems

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Article number033303
<mark>Journal publication date</mark>4/01/2005
<mark>Journal</mark>Physical Review B
Issue number3
Number of pages3
<mark>Original language</mark>English


We report calculations of the energies of excitons and biexcitons in ideal two-dimensional bilayer systems within the effective-mass approximation with isotropic electron and hole masses. The exciton energies are obtained by a simple numerical integration technique, while the biexciton energies are obtained from diffusion quantum Monte Carlo calculations. The exciton binding energy decays as the inverse of the separation of the layers, while the binding energy of the biexciton with respect to dissociation into two separate excitons decays exponentially.

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© 2005 The American Physical Society