Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: K1.00247 : Electronic structure of a realistic model of amorphous graphene
Author:
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.We show 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 $\pi$ states. We also report
preliminary density functional results for the electronic structure.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.K1.247
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