3.
Graphene ~ relativistic electron system
1. What's Graphene?
(Fig.
1)
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(Fig.
2)
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- Graphene is a one-atom-thick
planar sheet of sp2-bonded carbon atoms that are densely packed in a
honeycomb crystal lattice (Fig. 1).
- As a graphene preparation method, exfoliating a piece of graphene
from graphite is known to be the simplest. As we describe later, one of
the other methods is epitaxially growing the graphene layer on
SiC(0001) surfaces.
- The electronic band structure of the graphene is known to have a
linear dispersion against the momentum (E∝k), around K and
K' points (Fig. 2).
- This electron dispersion is given as the Dirac equation same as
neutrino.
