Binding energy of two-dimensional biexcitons

Jai Singh, Dan Birkedal, Lyssenko Vadim, Jørn Märcher Hvam

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    Abstract

    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.
    Original languageEnglish
    JournalPhysical Review B
    Volume53
    Issue number23
    Pages (from-to)15909-15913
    ISSN2469-9950
    DOIs
    Publication statusPublished - 1996

    Bibliographical note

    Copyright (1996) American Physical Society.

    Keywords

    • GAAS QUANTUM-WELLS
    • EXCITONIC MOLECULE
    • GENERATION
    • DYNAMICS
    • COHERENT
    • BOUND EXCITONS

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