Exciton-exciton interactions in quantum wells: Optical properties and energy and spin relaxation

S. Ben-Tabou de-Leon and B. Laikhtman
Phys. Rev. B 63, 125306 – Published 7 March 2001
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Abstract

A gas of interacting excitons in quantum wells is studied. We obtain the Hamiltonian of this gas by the projection of the electron-hole plasma Hamiltonian to exciton states and an expansion in a small density. Matrix elements of the exciton Hamiltonian are rather sensitive to the geometry of the heterostructure. The mean field approximation of the exciton Hamiltonian gives the blueshift and spin splitting of the exciton luminescence lines. We also write down the Boltzmann equation for excitons and estimate the energy and spin relaxation time resulting from the exciton-exciton scattering. Making use of these calculations, we succeeded in explaining some recent experimental results that have not been explained so far.

  • Received 7 August 2000

DOI:https://doi.org/10.1103/PhysRevB.63.125306

©2001 American Physical Society

Authors & Affiliations

S. Ben-Tabou de-Leon and B. Laikhtman

  • Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel

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Vol. 63, Iss. 12 — 15 March 2001

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