MIT Libraries logoDSpace@MIT

MIT
View Item 
  • DSpace@MIT Home
  • MIT Open Access Articles
  • MIT Open Access Articles
  • View Item
  • DSpace@MIT Home
  • MIT Open Access Articles
  • MIT Open Access Articles
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Energy gap of Kronig-Penney-type hydrogenated graphene superlattices

Author(s)
Lee, Joo-Hyoung; Grossman, Jeffrey C.
Thumbnail
DownloadLee-2011-Energy gap of Kronig-Penney-type.pdf (543.8Kb)
PUBLISHER_POLICY

Publisher Policy

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.

Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Metadata
Show full item record
Abstract
The electronic structure of graphene-graphane superlattices with armchair interfaces is investigated with first-principles density-functional theory. By separately varying the widths, we find that the energy gap Eg is inversely proportional to the width of the graphene strip and that the gap increases as the hydrogenated strip becomes wider due to the enhanced confinement effect. It is further demonstrated that, unlike other graphene nanostructures, the superlattices exhibit both direct and indirect band gaps without external perturbations. This peculiarity in the nature of Eg originates from the different connection structures of the symmetrized wave function at the boundary between adjacent unit cells due to the reflection symmetry of the superlattices. These findings suggest that the optical as well as electronic properties of graphene superlattices can be controlled through selective chemical functionalization.
Date issued
2011-09
URI
http://hdl.handle.net/1721.1/69872
Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Journal
Physical Review B
Publisher
American Physical Society
Citation
Lee, Joo-Hyoung, and Jeffrey Grossman. “Energy Gap of Kronig-Penney-type Hydrogenated Graphene Superlattices.” Physical Review B 84.11 (2011): [4 pages]. ©2011 American Physical Society.
Version: Final published version
ISSN
1098-0121

Collections
  • MIT Open Access Articles

Browse

All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

Login

Statistics

OA StatisticsStatistics by CountryStatistics by Department
MIT Libraries
PrivacyPermissionsAccessibilityContact us
MIT
Content created by the MIT Libraries, CC BY-NC unless otherwise noted. Notify us about copyright concerns.