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Title: The effects of interlayer mismatch on electronic properties of bilayer armchair graphene nanoribbons
Authors: Qian, Y.
Lam, K.-T.
Lee, C. 
Liang, G. 
Issue Date: Apr-2012
Citation: Qian, Y., Lam, K.-T., Lee, C., Liang, G. (2012-04). The effects of interlayer mismatch on electronic properties of bilayer armchair graphene nanoribbons. Carbon 50 (4) : 1659-1666. ScholarBank@NUS Repository.
Abstract: We investigate the impact of interlayer mismatch on the electronic properties of bilayer graphene nanoribbons (BGNRs) with armchair-edges in terms of the total energy and electronic structures by first principle calculations. Simulation results show that in-plane misalignments require little energy and a large variation in the energy bandgap (E G) can be observed. Based on the resulting atomic configurations due to the misalignments, the details of the observed relationship between bandgap and the lattice mismatch are investigated. It is observed that in general, misalignment in the transverse direction results in a decrease in the interaction between the two layers, giving rise to a larger E G. On the other hand, misalignment in the longitudinal direction, i.e. along the edges, leads to an oscillation in E G due to the periodic change of the GNR stacking order. A combination of these movements results in a complex variation of E G, which introduces great uncertainty in electronic devices. However, such a phenomenon could also be used in various kinds of nanoelectromechanical systems as it provides a large change in electronic properties with a small movement. © 2011 Elsevier Ltd. All rights reserved.
Source Title: Carbon
ISSN: 00086223
DOI: 10.1016/j.carbon.2011.12.007
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