Effects of Stone-Wales defect on the electronic and transport properties of bilayer armchair graphene nanoribbons. (December 2016)

• Record Type: Journal Article
• Authors: Rudi, Somayeh Gholami; Faez, Rahim; Moravvej-Farshi, Mohammad Kazem
• Is Part Of: Superlattices and microstructures. Volume 100(2016)
• Page Start: 739
• Page End: 748
• Publication Date: 2016-12
• Subjects: Superlattices as materials -- Periodicals; Microstructure -- Periodicals; Semiconductors -- Periodicals; Superréseaux -- Périodiques; Microstructure (Physique) -- Périodiques; Semiconducteurs -- Périodiques; 621.38152
• DOI: 10.1016/j.spmi.2016.10.025
• Languages: English
• ISSNs: 0749-6036

Abstract

Abstract: We report a first principles study on the electronic and transport properties of bilayer armchair graphene nanoribbons (BLAGNRs) containing Stone-Wales (SW) defect. It is shown that in the presence of SW defect in BLAGNRs, some electron localization occurs in defect atoms and degradation of transmission is observed in specific energy regions. The strength of electron localization is dependent on the symmetry of SW defect. In case of symmetric SW defect, stronger electron localization leads to sharper dip in its transmission spectrum in comparison with the broad dip in the transmission spectrum of the BLAGNR containing asymmetric SW defect. The effect of electron localization is also evident from the calculated I-V characteristics of pristine and defected structures which shows the reduced current in defected structures with respect to pristine structure. Most current reduction is observed in symmetric SW defected BLAGNR due to the stronger electron localization in symmetric SW defect. Highlights: Effects of SW defect on the electronic transport of BLAGNRs is investigated. Two different symmetries of SW defect is considered in our research. Electron localization in defect atoms degrades transmission of defected structures. Current in defected structures decreases with respect to the pristine structure. More current reduction in symmetric SW defected BLAGNR due to stronger localization.