Exciton confinement in InAsInP quantum wires and quantum wells in the presence of a magnetic field

Y. Sidor, B. Partoens, F. M. Peeters, J. Maes, M. Hayne, D. Fuster, Y. González, L. González, and V. V. Moshchalkov
Phys. Rev. B 76, 195320 – Published 19 November 2007

Abstract

The charge confinement in InAsInP based quantum wells and self-assembled quantum wires is investigated theoretically and experimentally through the study of the exciton diamagnetic shift. The numerical calculations are performed within the single-band effective mass approximation, including band nonparabolicity and strain effects. The exciton diamagnetic shift is obtained for quantum wires and quantum wells incorporating local width fluctuations, as well as the electron-hole Coulomb interaction energy. Both electrons and holes (but to a lesser extent) show a substantial penetration into the InP barrier. A detailed comparison is made between the theoretical and experimental data on the magnetic field dependence of the exciton diamagnetic shift. Our theoretical analysis shows that excitons in the InAsInP quantum well are trapped by local well width fluctuations.

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  • Received 24 July 2007

DOI:https://doi.org/10.1103/PhysRevB.76.195320

©2007 American Physical Society

Authors & Affiliations

Y. Sidor1, B. Partoens1, F. M. Peeters1, J. Maes2, M. Hayne3, D. Fuster4, Y. González4, L. González4, and V. V. Moshchalkov2

  • 1Departement Fysica, Universiteit Antwerpen (CGB), Groenenborgerlaan 171, B-2020 Antwerpen, Belgium
  • 2INPAC-Institute for Nanoscale Physics and Chemistry, Pulsed Field Group, K.U. Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
  • 3Department of Physics, Lancaster University, Lancaster LAI 4YB, United Kingdom
  • 4Instituto de Microelectrónica de Madrid (CNM-CSIC), Isaac Newton 8, Tres Cantos, Madrid 28760, Spain

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Issue

Vol. 76, Iss. 19 — 15 November 2007

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