Physics 541

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Physics 541
A quantum approach to condensed matter physics
Class 16
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Homework 8 Problems 4.14 and 5.2
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Summary of using DFT
Use knowledge of n in interacting system to find
energy from
From the energy we can find the crystal
structure, phonon spectrum
Band gaps not easy
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Energy denominator can vanish If q smaller than
2kF
This is the Kohn anomaly