| Download | - View accepted manuscript: Biexciton binding of Dirac fermions confined in colloidal graphene quantum dots (PDF, 1002 KiB)
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| DOI | Resolve DOI: https://doi.org/10.1021/acs.nanolett.5b01888 |
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| Author | Search for: Sun, Cheng; Search for: Figge, Florian; Search for: Ozfidan, Isil; Search for: Korkusinski, Marek1; Search for: Yan, Xin; Search for: Li, Liang-shi; Search for: Hawrylak, Pawel; Search for: McGuire, John A. |
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| Affiliation | - National Research Council of Canada. Security and Disruptive Technologies
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| Format | Text, Article |
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| Subject | Binding energy; Excitons; Graphene; Molecular physics; Nanocrystals; Quantum chemistry; Biexcitons; Configuration interactions; Dirac fermions; Hartree-fock; Transient absorption; Semiconductor quantum dots |
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| Abstract | We present transient absorption measurements and microscopic theory of biexciton binding in triangular colloidal graphene quantum dots consisting of 168 sp2-hybridized C atoms. We observe optical transitions from the lowest orbitally dark singlet exciton states to states below the energy of an unbound dark+bright singlet-exciton pair. Through microscopic calculations of the low-energy exciton and biexciton states via tight-binding, Hartree-Fock, and configuration interaction methods, the spectra reveal a biexciton consisting primarily of a dark-bright singlet-pair bound by ∼0.14 eV. |
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| Publication date | 2015-07-20 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21277030 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | f5ca3912-c4db-47dd-82e9-9de3b0d2ee11 |
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| Record created | 2015-11-10 |
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| Record modified | 2020-06-04 |
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