Question: Kronig-Penney model (a) For the delta-function potential and with P < < 1, find at k = 0 the energy of the Lowest energy band.

Kronig-Penney model

(a) For the delta-function potential and with P << 1, find at k = 0 the energy of the Lowest energy band.

(b) Fur the same problem find the band gap at k = π/a.

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a At k 0 the determinantal equation is PKa sin Ka cos Ka 1 In the limit of small positive P ... View full answer

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