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 output: Contribution to journalArticleResearchpeer-review

    26 Citations (Scopus)

    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. [Figure not available: see fulltext.] © 2013 Tsinghua University Press and Springer-Verlag Berlin Heidelberg.
    Original languageEnglish
    Pages (from-to)326-334
    JournalNano Research
    Volume6
    Issue number5
    DOIs
    Publication statusPublished - 1 May 2013

    Keywords

    • Anderson insulators
    • electronic transport
    • graphene
    • localization

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