Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-11-23
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
12 pages, 7 figures
Scientific paper
The electron, hole, and exciton g-factors and diamagnetic coefficients have been calculated using envelope-function theory for cylindrical InAs/InP quantum dots in the presence of a magnetic field parallel to the dot symmetry axis. A clear connection is established between the electron g-factor and the amplitude of the those valence-state envelope functions which possess non-zero orbital momentum associated with the envelope function. The dependence of the exciton diamagnetic coefficients on the quantum dot height is found to correlate with the energy dependence of the effective mass. Calculated exciton g-factor and diamagnetic coefficients, constructed from the values associated with the electron and hole constituents of the exciton, match experimental data well, however including the Coulomb interaction between the electron and hole states improves the agreement. Remote-band contributions to the valence-band electronic structure, included perturbatively, reduce the agreement between theory and experiment.
Bree van J.
Flatte' Michael E.
Koenraad P. M.
Pryor Craig E.
Silov Yu. A.
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