Exciton and biexciton energies in bilayer systems

Details Exciton and biexciton energies in bilayer systems Exciton and biexciton energies in bilayer systems

2008-01-02

arxiv.org/abs/0801.0375v1

Phys. Rev. B 71, 033303 (2005)

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1103/PhysRevB.71.033303

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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