# Graphene concepts

Tags:
1. Aug 31, 2011

### marie2010

hi,
I was reading an article about graphene and I came across some concepts I am not familiar with. I was just wondering if someone could help me understand them:

The article says that charge carriers in graphene are massless fermions that are described with a Dirac-like equation rather than Schrodinger equation. The bilayer graphene are, on the other hand, massive Dirac fermions. Can someone comment on what it all means (in terms of the material properties, etc)? Why is it important?
Thanks a lot.

marie

2. Mar 18, 2012

### ErolDynamics

Re: graphene

I am not sure but I think at zero point charge carries behave like relativistic particle. Which means E=h.f . I will ask this issue to my supervisors in my project group. I will return you in a few days. Thank you very much :)

3. Apr 1, 2012

### PRB147

Re: graphene

the equations describing the graphene is the same as that for the neutrino (except the velocity). neutrino is massless. so does the graphene.
The bilayer graphene is described by the different equations which have the second order
derivative on the x,y coordinates, so massive Dirac fermions