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28 (a) Plot the density of states in the conduction band of silicon over the range...

28 (a) Plot the density of states in the conduction band of silicon over the range Ec < E< Ec + 0.4 eV . (b) Repeat part (a) for the density of states in the valence band over the range Ev- 0.4 eV < E < Ev.

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