# Density of state

by mahdi
Tags: density, state
 P: 3 What is the solution of Dirac delta function of density of sate equation below: DOS(E)=2/N ∑ ∫(1/dEj(k)/dk).δ[Ej(k)-E]dE
 P: 27 are you sure this expression makes sense? Maybe I miss something?
P: 35
 Quote by mahdi What is the solution of Dirac delta function of density of sate equation below: DOS(E)=2/N ∑ ∫(1/dEj(k)/dk).δ[Ej(k)-E]dE
Hi,you can use " tex formula tex " to eidt your formula as follows

$$\frac{1}{2}Ax= b$$

P: 3
Density of state

Thank you, I'm attaching the equation in word denouement.
Attached Files
 Doc1.docx (23.2 KB, 8 views)
 P: 27 This is basically the density of state at energy E from N_hex bands. The delta function filters out the energy spectrum at E_j(k_t)=E. 1/|dE/dk| gives density of state at E from the given band
 P: 3 Do you mean the final equation become like this DOS(E)=E. 1/|dEj/dk| please do you have a reference of this solution ?
 P: 27 should be DOS(E)= sum_j (1/|dEj/dk|). Take a look at Ashcroft and Mermin's solid state physics

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