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Edge-modified zigzag-shaped graphene nanoribbons: structure and electronic properties

Saroka, Vasil; Batrakov, K.G.; Chernozatonskii, L.A.
Journal article, Peer reviewed
Accepted version
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Phys.+Solid+State+56%2C+2135+%282014%29_preprint.pdf (2.263Mb)
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http://hdl.handle.net/11250/2581560
Utgivelsesdato
2014
Metadata
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Originalversjon
Physics of the solid state. 2014, 56 (10), 2135-2145.   10.1134/S106378341410028X
Sammendrag
Control of the band gap of graphene nanoribbons is an important problem for the fabrication of effective radiation detectors and transducers operating in different frequency ranges. The periodic edge-modified zigzag-shaped graphene nanoribbon (GNR) provides two additional parameters for controlling the band gap of these structures, i.e., two GNR arms. The dependence of the band gap E g on these parameters is investigated using the π-electron tight-binding method. For the considered nanoribbons, oscillations of the band gap E g as a function of the nanoribbon width are observed not only in the case of armchair-edge graphene nanoribbons (as for conventional graphene nanoribbons) but also for zigzag GNR edges. It is shown that the change in the band gap E g due to the variation in the length of one GNR arm is several times smaller than that due to the variation in the nanoribbon width, which provides the possibility for a smooth tuning of the band gap in the energy spectrum of the considered graphene nanoribbons.
Utgiver
Springer Verlag
Tidsskrift
Physics of the solid state

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