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cse • paper_2 • solid_state_electronicscse-2011-subject-08-003

Band theory — UPSC CSE 2011 Physics PYQ

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Explain the origin of energy band formation in solids. Show that in nearly free electron approximation, the energy band gap is 2|V_G|, where V_G is Fourier transform of periodic potential seen by the valence electrons.

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