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Electron and hole fermi surface-what does it mean?

  1. Apr 10, 2010 #1
    hi i was reading the following paragraph and i do not understand what it means. can someone explain what it means to me please? i know what the individual concepts are eg fermi line, hall coefficeint extended zone schemes, but am not grasping the concept of the two types of fermi surface...


    "For electron states contained within the fermi line in reduced or periodically extended zone schemes we have an electron fermi surface and a negative hall coefficient. For electron states contained outside the Fermi line in reduced or periodically extended zone schemes we have a hole fermi surface and a positive hall coefficient."


    thanks
     
  2. jcsd
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