Commit 5d9753dd authored by T. van der Sar's avatar T. van der Sar
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Update 13_semiconductors_solutions.md

parent bac0b6c5
......@@ -111,8 +111,8 @@ Assume $t_{cb}$ and $t_{vb}$ positive.
For electrons, do a taylor expansion around $k=0$ (min) of $E_{cb} = E_G - 2 t_{cb} [\cos(ka)-1],$.
For holes, do a taylor expansion around $k=0$ (max) of $E_{vb} = 2 t_{vb} [\cos(ka)-1]$.
Near $k=0$
$$ E_{cb} = E_G - t_{cb}(ka)^2$$
$$ E_{vb} = t_{vb}(ka)^2 $$
$$ E_{cb} = E_G + t_{cb}(ka)^2$$
$$ E_{vb} = -t_{vb}(ka)^2 $$
### Subquestion 3
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