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Fermi energy

  1. Jun 28, 2014 #1
    Is is possible to find unoccupied states below fermi energy??

    Or all states below fermi energy are always occupied?
     
  2. jcsd
  3. Jun 28, 2014 #2

    ZapperZ

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    At T=0K, in a metal, it is DEFINED as the highest occupied energy state.

    So what you are asking is whether we can negotiate our definition.

    Zz.
     
  4. Jun 29, 2014 #3
    no, it is not possible
     
  5. Jun 30, 2014 #4
    Yes, It is possible. In a semiconductor the Fermi level is usually between conduction and valence band and we can have hole (unoccupied state) in valence band.
     
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