Show that if a band has a minimum but is not isotropic, that is, that the density
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Show that if a band has a minimum but is not isotropic, that is,
that the density of states near k(vector) = 0 is still proportional to √(E − E0). In this case, the Taylor expansion is
This gives a matrix for the quadratic term, which can always be diagonalized.
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Since the energy can be expanded around its minimum as 1 8 E 24 OkiOkj E Eo and the o...View the full answer
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