Exciton and biexciton energies in bilayer systems

M. Y. J. Tan, N. D. Drummond, and R. J. Needs
Phys. Rev. B 71, 033303 – Published 4 January 2005

Abstract

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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  • Received 26 August 2004

DOI:https://doi.org/10.1103/PhysRevB.71.033303

©2005 American Physical Society

Authors & Affiliations

M. Y. J. Tan

  • St. Edmund’s College, Mount Pleasant, Cambridge CB3 0BN, United Kingdom

N. D. Drummond and R. J. Needs

  • Theory of Condensed Matter Group, Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge, CB3 0HE, United Kingdom

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Issue

Vol. 71, Iss. 3 — 15 January 2005

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