This article is cited in 32 papers

Graphenes

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

V. A. Soroko^a, K. G. Batrakov^a, L. A. Chernozatonskii<sup>b

a</sup> Research Institute for Nuclear Problems Belarusian State University, Minsk
^b Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow

Abstract: 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 $\pi$-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.

Received: 15.04.2014

 English version: Physics of the Solid State, 2014, 56:10, 2135–2145

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