Electronic structure of a realistic model of amorphous graphene

V. Kapko, D. A. Drabold, Michael Thorpe

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

In this note, we calculate the electronic properties of a realistic atomistic model of amorphous graphene. The model contains odd-membered rings, particularly five and seven membered rings and no coordination defects.Weshow that odd-membered rings increase the electronic density of states at the Fermi level relative to crystalline graphene; a honeycomb lattice with semimetallic character. Some graphene samples contain amorphous regions, which even at small concentrations, may strongly affect many of the exotic properties of crystalline graphene, which arise because of the linear dispersion and semi-metallic character of perfectly crystalline graphene. Estimates are given for the density of states at the Fermi level using a tight-binding model for the π states.

Original languageEnglish (US)
Pages (from-to)1197-1200
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume247
Issue number5
DOIs
StatePublished - May 2010

Keywords

  • Amorphous graphene
  • Continuous random network
  • Density of states

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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