Geometric and Electronic Structure of Graphene Bilayer Edges

Loading...
Thumbnail Image
Penn collection
Departmental Papers (MSE)
Degree type
Discipline
Subject
Engineering
Materials Science and Engineering
Funder
Grant number
License
Copyright date
Distributor
Related resources
Author
Contributor
Abstract

We present a computational investigation of free-standing graphene bilayer edge (BLE) structures, aka “fractional nanotubes.” We demonstrate that these curved carbon nanostructures possess a number of interesting properties, electronic in origin. The BLEs, quite atypical of elemental carbon, have large permanent electric dipoles of 0.87 and 1.14 debye/Å for zigzag and armchair inclinations, respectively. An unusual, weak AA interlayer coupling leads to a twinned double-cone dispersion of the electronic states near the Dirac points. This entails a type of quantum Hall behavior markedly different from what has been observed in graphenebased materials, characterized by a magnetic field-dependent resonance in the Hall conductivity.

Advisor
Date Range for Data Collection (Start Date)
Date Range for Data Collection (End Date)
Digital Object Identifier
Series name and number
Publication date
2010-10-09
Journal title
Volume number
Issue number
Publisher
Publisher DOI
Journal Issue
Comments
Suggested Citation: Feng, J., Qi, L., Huang, J.Y. and Li, J. (2009). "Geometric and electronic structure of graphene bilayer edges." Physical Review B. 80, 165407. © 2009 The American Physical Society http://dx.doi.org/10.1103/PhysRevB.80.165407
Recommended citation
Collection