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Title: Electronic and magnetic properties of graphite quantum dots
Authors: Abdelsalam, Hazem
Espinosa-Ortega, Tania
Luk'yanchuk, Igor
Keywords: DRNTU::Science::Physics::Electricity and magnetism
Issue Date: 2015
Source: Abdelsalam, H., Espinosa-Ortega, T., & Luk'yanchuk, I. (2015). Electronic and magnetic properties of graphite quantum dots. Low Temperature Physics, 41(5), 396-400.
Series/Report no.: Low Temperature Physics
Abstract: We study the electronic and magnetic properties of multilayer quantum dots (MQDs) of graphite in the nearest-neighbor approximation of tight-binding model. We calculate the electronic density of states and orbital susceptibility of the system as function of the Fermi level location. We demonstrate that properties of MQD depend strongly on the shape of the system, on the parity of the layer number and on the form of the cluster edge. The special emphasis is given to reveal the new properties with respect to the monolayer graphene quantum dots. The most interesting results are obtained for the triangular MQD with zig-zag edge at near-zero energies. The asymmetrically smeared multipeak feature is observed at Dirac point within the size-quantized energy gap region, where monolayer graphene flakes demonstrate the highly-degenerate zero-energy state. This feature, provided by the edge-localized electronic states results in the splash-wavelet behavior in diamagnetic orbital susceptibility as function of energy.
ISSN: 1063-777X
DOI: 10.1063/1.4919377
Rights: © 2015 AIP Publishing LLC. This paper was published in Low Temperature Physics and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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