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3D Plot of Electronic Band Structure




This is graphene's band structure. Hexagon that is seen in the middle of plot is reciprocal lattice of the graphene. Shape of the direct lattice and reciprocal lattice are same. Reciprocal lattice contains some high symmetry points and sharp peaks that is seen above are the point "K". Band structure at that point has a special name, Dirac Cone where electrons can move in relativistic speed like photon. They are called massless Dirac fermiyons. 

Whenever we see a band structure plot we always confonr with 2D plot. Vertical axis is energy and horizontal axis is k-points. Bands are plotted for different paths between high stymmery points. 
  band structure of graphene ile ilgili görsel sonucu
     2D version is only a projection of  3D plot. 











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