Nano Research

, Volume 6, Issue 5, pp 326–334

Highly defective graphene: A key prototype of two-dimensional Anderson insulators

  • Aurélien Lherbier
  • Stephan Roche
  • Oscar A. Restrepo
  • Yann-Michel Niquet
  • Arnaud Delcorte
  • Jean-Christophe Charlier
Research Article

DOI: 10.1007/s12274-013-0309-7

Cite this article as:
Lherbier, A., Roche, S., Restrepo, O.A. et al. Nano Res. (2013) 6: 326. doi:10.1007/s12274-013-0309-7

Abstract

Electronic structure and transport properties of highly defective two-dimensional (2D) sp2 graphene are investigated theoretically. Classical molecular dynamics are used to generate large graphene planes containing a considerable amount of defects. Then, a tight-binding Hamiltonian validated by ab initio calculations is constructed in order to compute quantum transport within a real-space order-N Kubo-Greenwood approach. In contrast to pristine graphene, the highly defective sp2 carbon sheets exhibit a high density of states at the charge neutrality point raising challenging questions concerning the electronic transport of associated charge carriers. The analysis of the electronic wavepacket dynamics actually reveals extremely strong multiple scattering effects giving rise to mean free paths as low as 1 nm and localization phenomena. Consequently, highly defective graphene is envisioned as a remarkable prototype of 2D Anderson insulating materials.
https://static-content.springer.com/image/art%3A10.1007%2Fs12274-013-0309-7/MediaObjects/12274_2013_309_Fig1_HTML.gif

Keywords

grapheneelectronic transportAnderson insulatorslocalization

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Aurélien Lherbier
    • 1
  • Stephan Roche
    • 2
    • 3
  • Oscar A. Restrepo
    • 4
  • Yann-Michel Niquet
    • 5
  • Arnaud Delcorte
    • 4
  • Jean-Christophe Charlier
    • 1
  1. 1.Institute of Condensed Matter and Nanoscience (IMCN)Université catholique de Louvain (UCL)Louvain-la-NeuveBelgium
  2. 2.Catalan Institute of NanotechnologyCIN2 (ICN-CSIC) and Universitat Autónoma de Barcelona, Campus UABBellaterra (Barcelona)Spain
  3. 3.Institució Catalana de Recerca i Estudis AvançatsICREABarcelonaSpain
  4. 4.Institute of Condensed Matter and Nanoscience (IMCN), BSMAUniversité catholique de Louvain (UCL)Louvain-la-NeuveBelgium
  5. 5.L_Sim, SP2M, UMR-E CEA/UJF-Grenoble 1INACGrenoble Cedex 9France