Optical properties of graphene quantum dots with fractionally filled degenerate shell of zero energy states

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DOIResolve DOI: http://doi.org/10.1063/1.3666604
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TypeArticle
Proceedings titlePHYSICS OF SEMICONDUCTORS: 30th International Conference on the Physics of Semiconductors
Series titleAIP Conference Proceedings; no. 1399
Conference30th International Conference on the Physics of Semiconductors, ICPS-30, 25 July 2010 through 30 July 2010, Seoul
ISSN0094-243X
1551-7616
ISBN9780735410022
Pages771772; # of pages: 2
AbstractWe demonstrate that in triangular graphene quantum dots with zigzag edges (TGQD), robust optical transitions occur simultaneously in the THz, visible and UV spectral ranges. Optical properties are determined by strong electron-electron and excitonic interactions. Using a combination of tight-binding, Hartree-Fock and configuration interaction approaches, we show that charging of TGQDs by an external gate drastically modifies both the optical and magnetic properties. It is thus possible to design a gate and size tunable graphene quantum dot with desired electronic, magnetic and optical properties for opto-electronic and photo-voltaic applications. © 2011 American Institute of Physics.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Microstructural Sciences (IMS-ISM)
Peer reviewedYes
NPARC number21271258
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Record identifierd9566abe-5a96-4f5b-9bd8-ee0c55b67724
Record created2014-03-24
Record modified2016-05-09
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