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Miloszewski, JM; Tomic, S; Binks, D
Publisher: IOP Publishing
Languages: English
Types: Article
Subjects: energy

Classified by OpenAIRE into

arxiv: Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Condensed Matter::Materials Science
We present a method for calculating exciton and bi-exciton energies in type-II colloidal quantum dots. Our methodology is based on an 8-band k p Hamiltonian of the zinc- blend structure, which incorporates the effects of spin-orbit interaction, strain between the core and the shell and piezoelectric potentials. Exciton states are found using the configuration interaction (CI) method that explicitly includes the effects of Coulomb interaction, as well as exchange and correlation between many-electron configurations. We pay particular attention to accurate modelling of the electrostatic interaction between quasiparticles. The model includes surface polarization and self-polarization effects due to the large difference in dielectric constants at the boundary of the QD.
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    • [1] Califano M, Zunger A and Franceschetti A 2004 Applied Physics Letters 84 2409{2411 ISSN 0003-6951, 1077-3118
    • [2] Tomic S 2010 Physical Review B 82 195321
    • [3] Wang L W, Califano M, Zunger A and Franceschetti A 2003 Physical Review Letters 91 056404
    • [4] Tomic S, Sunderland A G and Bush I J 2006 Journal of Materials Chemistry 16 1963{1972 ISSN 1364-5501
    • [5] Vukmirovic N, Ikonic Z, Indjin D and Harrison P 2006 Journal of Physics: Condensed Matter 18 6249 ISSN 0953-8984
    • [6] Vukmirovc N and Tomic S 2008 Journal of Applied Physics 103 103718{103718{12 ISSN 00218979
    • [7] Tomic S, Montanari B and Harrison N M 2008 Physica E: Low-dimensional Systems and Nanostructures 40 2125{2127 ISSN 1386-9477
    • [8] Piryatinski A, Ivanov S A, Tretiak S and Klimov V I 2007 Nano Letters 7 108{115 ISSN 1530-6984
    • [9] Franceschetti A, Williamson A and Zunger A 2000 The Journal of Physical Chemistry B 104 3398{3401 ISSN 1520-6106
    • [10] Bolcatto P G and Proetto C R 2001 Journal of Physics: Condensed Matter 13 319 ISSN 0953-8984
    • [11] Yu W W, Qu L, Guo W and Peng X 2003 Chemistry of Materials 15 2854{2860
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