The potential of an electron in a one-dimensional lattice is of the same type as that used in the Kronig-Penney model. Assuming V, ab << n?Im, prove that the energy band gap at k = nla is 2V,bla. %3D

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The potential of an electron in a one-dimensional lattice is of the same
type as that used in the Kronig-Penney model. Assuming
1.
V, ab << h?/m,
prove that the energy band gap at k = tla is 2V bla.
Transcribed Image Text:The potential of an electron in a one-dimensional lattice is of the same type as that used in the Kronig-Penney model. Assuming 1. V, ab << h?/m, prove that the energy band gap at k = tla is 2V bla.
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