Binding energy of two-dimensional biexcitons

Jai Singh, D. Birkedal, V.G. Lyssenko, J.M. Hvam

Research output: Contribution to journalComment/debate


Using a model structure for a two-dimensional (2D) biexciton confined in a quantum well, it is shown that the form of the Hamiltonian of the 2D biexciton reduces into that of an exciton. The binding energies and Bohr radii of a 2D biexciton in its various internal energy states are derived analytically using the fractional dimension approach. The ratio of the binding energy of a 2D biexciton to that of a 2D exciton is found to be 0.228, which agrees very well with the recent experimental value. The results of our approach are compared with those of earlier theories. © 1996 The American Physical Society.
Original languageEnglish
Pages (from-to)15909-15913
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number23
Publication statusPublished - 1996


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