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Fermi function for Superconductors?

  1. Oct 19, 2007 #1
    I don't really understand why the Fermi-Function is often used to describe superconductors. According to the BCS theory Cooper pairs should be Bosons with Spin 0. Wouldn't it make more sense to use the Bose-Einstein-Function?
  2. jcsd
  3. Oct 19, 2007 #2


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    I think yo have to be a bit more specific.
    At non-zero temperatures you always have quasiparticles in the superconductor and they are fermions, is this what you were refering to?
  4. Oct 19, 2007 #3


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    As has been mentioned, you need to be a bit more specific than this.

    The Fermi function is STILL relevant here in the single-particle description. When you look at the BCS density of states, you are looking at the single-particle density of states, which is the density of states of the fermion, not the boson. The fermions that make up the composite boson (Cooper Pairs) still have to obey the FD statistics, even when the composite bosons don't.

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