Fermi energy (in graphite)

  • Thread starter fluidistic
  • Start date
  • #1
fluidistic
Gold Member
3,674
112

Homework Statement


Graphite has a structure of parallel planes weakly interacting with each others such that for many effects it can be considered as two dimensional. Each plane has a hexagonal (honeycomb) structure with a single C atom by site which gives 1 electron of conduction. Assume that the model of free electrons can be applied to all conduction electrons, find the Fermi energy.


Homework Equations


Not really sure. Are there some missing data?


The Attempt at a Solution


What boggles me is that there's no volume given nor electron density. I don't think I can calculate the latter either, because even though I know there is 1 atom per elementary unit, I do not know the distance between atoms (not sure it even makes sense in a honeycomb structure). Thus I don't really know how to tackle the problem.
I know that [itex]E_F= \frac{\hbar ^2 \pi n }{m} [/itex]. I know that n is the density of electron for an area unit but that number is an unknown in the problem.
I'd like some tip to start the problem, thank you!
 
Last edited:

Answers and Replies

Related Threads on Fermi energy (in graphite)

  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
0
Views
2K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
7
Views
44K
  • Last Post
Replies
1
Views
680
Replies
1
Views
3K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
3
Views
707
Replies
2
Views
839
Top