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andrewm
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In the first diagram on http://hyperphysics.phy-astr.gsu.edu/hbase/solids/fermi.html" , the band gap in a semiconductor is shown.
What is the corresponding Fermi momentum? If you plug E_F into the dispersion relation, you get no solution for k_F, right?
I ask because an equation is given with a sum of all k such that k < k_F, and there is a band gap. Does one sum over all k?
What is the corresponding Fermi momentum? If you plug E_F into the dispersion relation, you get no solution for k_F, right?
I ask because an equation is given with a sum of all k such that k < k_F, and there is a band gap. Does one sum over all k?
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