[Pw_forum] DOS of graphene

[meisam aghtar]

Dear all
 I want to calculate the density of state of graphene but there is a problem that it is extremely variant by changing the parameters. the best plot of DOS that I could find is linear at fermi energy but there is a gap there. 
what is the reason of these variation? and which parameters should be adjusted? would you give me an input which you know it gives a good resault. the potential that I use is in LDA approximation.
thank you.
M. Aghtar
Msc student
physics department of Kashan university  


      
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