(adsbygoogle = window.adsbygoogle || []).push({}); what is the value of "N" ?

Hi to everyone

in the following equation (electrical conductivity in correlated barrier hopping (CBH) model), N is the density of localized states..

I read these matter in some papers but anyone has reported a value for it.

how i must determine this value?

σ_ac=((π^2 N^2 ε^*)/24) [(8e^2)/(ε^* W_M )]^6 (ω^s/τ^β )

ε^*=ε_1+iε_2

ε^* is complex dielectric constant

ε_1 and ε_2 are the real and imaginary parts of the complex dielectric constant, respectively.

W_M is the maximum barrier height of the material under investigation

τ is the effective relaxation time and the exponent s is related to W_M at low temperature by the relation:

s=1-β=1-(6k_BT/W_M)

k_B is is Boltzmann's constant.

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# What is the value of N ?

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