Show simple item record

dc.contributor.authorSevinçli, H.en_US
dc.contributor.authorTopsakal, M.en_US
dc.contributor.authorÇıracı, Salimen_US
dc.date.accessioned2016-02-08T10:06:14Z
dc.date.available2016-02-08T10:06:14Z
dc.date.issued2008en_US
dc.identifier.issn1098-0121
dc.identifier.urihttp://hdl.handle.net/11693/22898
dc.description.abstractBased on first-principles calculations we predict that periodically repeated junctions of armchair graphene nanoribbons of different widths form multiple quantum well structures. In these superlattice heterostructures the width as well as the energy-band gap is modulated in real space and specific states are confined in certain segments. Not only the size modulation, but also composition modulation, such as periodically repeated and commensurate heterojunctions of boron nitride and graphene honeycomb nanoribbons, results in a multiple quantum well structure. The geometrical features of the constituent nanoribbons, namely, their widths and lengths, the form of the junction, as well as the symmetry of the resulting superlattice, are the structural parameters available to engineer electronic properties of these quantum structures. We present our analysis regarding the variation of the band gaps and the confined states with these structural parameters. Calculation of transmission coefficient through a double barrier resonant tunneling device formed from a finite segment of such a multiple quantum well structure and placed between metallic electrodes yields resonant peaks which can be identified with electronic states confined in the well. We show that these graphene-based quantum structures can introduce interesting concepts to design nanodevices. Relevance of the quantum structures are discussed in view of the most recent experimental results.en_US
dc.language.isoEnglishen_US
dc.source.titlePhysical Review B - Condensed Matter and Materials Physicsen_US
dc.relation.isversionofhttp://dx.doi.org/10.1103/PhysRevB.78.245402en_US
dc.titleSuperlattice structures of graphene-based armchair nanoribbonsen_US
dc.typeArticleen_US
dc.departmentDepartment of Physics
dc.departmentInstitute of Materials Science and Nanotechnology
dc.citation.spage245402-1en_US
dc.citation.epage245402-8en_US
dc.citation.volumeNumber78en_US
dc.citation.issueNumber24en_US
dc.identifier.doi10.1103/PhysRevB.78.245402en_US
dc.publisherAmerican Physical Societyen_US
dc.contributor.bilkentauthorÇıracı, Salimen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record