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Does each band have multiple allowed E-values for th same k?

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  1. Feb 13, 2015 #1
    So every theoretical resource I've been able to find seems to map bands to lines for a 1D crystal, surfaces for a 2D crystal, and hypersurfaces for a 3D crystal. But then there are images like the ARPES data below (fig. 1a, 1b, 2) where the density of states is a lot higher within the valence band energy range even if there isn't a band-line nearby. ARPES should restrict k to one axis, so I don't think it can be explained by variance from k in the other directions.

    Many explanatory images also show the bands as if the valence band has states below the band-line and the conduction band has states above the band-line, like fig. 3.


    nphys1128-f2.jpg
    fig. 1


    Bi2Se3_ARPES.jpg
    fig. 2


    220px-Topological_insulator_band_structure.svg.png
    fig. 3
     
  2. jcsd
  3. Feb 18, 2015 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
     
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