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Discontinuous at horizontal axis, U and K points, in energy

  1. May 20, 2015 #1
    I have a question about horizontal axis of energy band.
    In band structure of FCC lattice, like Si, GaAs, the horizontal axis have discontinuous at U point and K point. But other region have continuous like from Gamma to X or to L.
    I cannot hit on an idea about this discontinuous.
    Would anyone who understand the reason answer this question, please teach me.
     

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  3. May 20, 2015 #2

    DrDu

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