Departmental Papers (MSE)

Document Type

Journal Article

Date of this Version

10-9-2010

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.

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

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Date Posted: 02 December 2010

This document has been peer reviewed.