| Download | - View accepted manuscript: Electronic and magnetic properties of triangular graphene quantum rings (PDF, 442 KiB)
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| DOI | Resolve DOI: https://doi.org/10.1103/PhysRevB.83.174441 |
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| Author | Search for: Potasz, P.1; Search for: Guclu, A. D.1; Search for: Voznyy, O.1; Search for: Folk, J. A.; Search for: Hawrylak, P.1 |
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| Affiliation | - National Research Council of Canada. NRC Institute for Microstructural Sciences
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| Format | Text, Article |
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| Abstract | Electronic and magnetic properties of triangular graphene rings potentially fabricated using carbon nanotubes as masks are described as a function of their size and width. The electronic properties of the charge neutral system are calculated using tight-binding method and interactions are treated using the mean-field Hubbard model. We show that for triangular quantum dots with a triangular hole, the magnetic properties are determined by the width of the ring, leading to ferromagnetic corners and antiferrimagnetic sides. The electronic properties of gated graphene quantum rings as a function of additional number of electrons or holes are described by a combination of tight-binding, Hartree-Fock, and configuration interaction methods. The outer edge is found to be maximally spin polarized for almost all filling factors while the evolution of the excitation gap as a function of shell filling shows oscillations as a result of electronic correlations. |
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| Publication date | 2011-05-31 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 19371552 |
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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 | daf967cc-4648-4d76-b354-ee1e031fff03 |
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| Record created | 2012-02-29 |
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| Record modified | 2020-04-21 |
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