Question
The conduction and valence bands in a semiconductor can be described as Ec(k) = E1 E2 cos ka and Ev(k) = E3 + E4
The conduction and valence bands in a semiconductor can be described as Ec(k) = E1 − E2 cos ka and Ev(k) = E3 + E4 cos 2ka, respectively, where E1=6 eV, E2=1 eV, E3=3.4 eV, E4=0.5 eV.
(a) Sketch the E(k) diagram for this semiconductor. Is it a direct or indirect bandgap material? What is the bandgap energy?
(b) Find the hole to electron effective mass ratio.
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Matlab An Introduction with Applications
Authors: Amos Gilat
5th edition
1118629868, 978-1118801802, 1118801806, 978-1118629864
