Physics Help Forum Energy of band of d-dimensional semiconductor when voltage V is applied across
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 Apr 29th 2019, 11:21 AM #1 Junior Member   Join Date: Apr 2019 Posts: 1 Energy of band of d-dimensional semiconductor when voltage V is applied across Let's say we have a one-dimensional semiconductor and I apply voltage V across it, I want to calculate the energy of a parabolic band, when a source and drain voltage is applied across it. I expect it to be $U = \Sigma_k \frac{\hbar^2 k^2}{2 m^*}f(k)$ where f(k) is the fermi function. When no voltage is applied $U_0 = \Sigma_k \frac{\hbar^2 k^2}{2 m^*}f_0(k)$ (I am just confused what the fermi-level should be in the case when voltage is applied and I want to do a full integral including temperature dependence) My question basically is, what is the expression for $f(k)$ and $f_0(k)$. Would it be different in the ballistic and diffusive regime? And how do I extend this for d-dimensional semiconductor?
 Apr 30th 2019, 12:22 PM #2 Senior Member   Join Date: Apr 2015 Location: Somerset, England Posts: 1,035 The Konig Penney equation is the appropriate wave model have a play here https://lampx.tugraz.at/~hadley/ss1/...onigPenney.php topsquark likes this.

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