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Electron and hole confinement in stacked self-assembled InP quantum dots

Hayne, M and Provoost, Rik and Zundel, Markus K and Manz, Yvonne M and Eberl, Karl and Moshchalkov, Victor V (2000) Electron and hole confinement in stacked self-assembled InP quantum dots. Physical Review B, 62 (15). pp. 10324-10328. ISSN 1550-235X

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    Abstract

    We report photoluminescence measurements on stacked self-assembled InP quantum dots in magnetic fields up to 50 T. For triply stacked layers the dots become strongly coupled when the layer separation is 4 nm or less. In contrast, doubly stacked layers show no sign of coupling. We explain this puzzling difference in coupling by proposing a model in which the holes are weakly confined in the GaxIn1-xP layers separating the layers of dots, and are responsible for the coupling. Since only one such intervening layer exists in the doubly stacked dots coupling is excluded. Our model is strongly supported by the exciton masses and radii derived from our experimental results, and is consistent with available theory.

    Item Type: Article
    Journal or Publication Title: Physical Review B
    Additional Information: © 2000 The American Physical Society
    Uncontrolled Keywords: MAGNETOLUMINESCENCE
    Subjects: UNSPECIFIED
    Departments: Faculty of Science and Technology > Physics
    ID Code: 49849
    Deposited By: ep_importer_pure
    Deposited On: 20 Sep 2011 09:30
    Refereed?: Yes
    Published?: Published
    Last Modified: 26 Jul 2012 19:32
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/49849

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