Posted by MRH on April 6, 2014, 9:16 pm, in reply to "Re: Q 11.4 of course text"
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I think I've got it. The condition to be a metal is that the lower band is not fully filled...to allow some of the k-states to be shifted by an E field (Drude model). So the material is a metal if the bands anywhere overlap, and an insulator otherwise. That gives the condition. Churning the algebra now... Is that right? |
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