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Why is silver the best conductor?

  1. Mar 29, 2015 #1
    More specifically, the free electron density in increasing order goes like this:

    Ag
    Cu
    Al

    why then is the conductivity in the reverse order? ie the free electron density doesn't seem to play much of a role in conductivity beyond a certain point.
     
  2. jcsd
  3. Mar 29, 2015 #2
    Probably due to electron-electron scattering, if there are too many free electrons then they will collide with each other and limit the conductivity.
     
  4. Mar 29, 2015 #3

    ZapperZ

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    Really? Where did you get the info that the conductivity is in "the reverse order"?

    http://chemistry.about.com/od/molec...f-Electrical-Resistivity-And-Conductivity.htm

    Secondly, the conductivity isn't just a function of charge carrier density. The resistivity is a function scattering of charge carrier with phonons, impurities, defects, etc. BTW, electron-electron scattering, per Landau Fermi Liquid description, plays a minor role in the conductivity at ordinary temperatures. It is only apparent at extremely low temperature near 0 K.

    This probably should have been posted in the Solid State physics forum.

    Zz.
     
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