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Electron gas, electron liquid, electron crystal (Read 1993 times)
Gerrit-Jan Linker
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Electron gas, electron liquid, electron crystal
27.05.09 at 12:37:05
 
Electron gas, electron liquid, electron crystal
 
If r = Epotential / Ekinetic
 

  • r<1 : Electron gas
    Weakly interacting regime.  Coulomb interaction is weak.
     
  • r>1: Electron liquid
    Interactions between electrons are imporant. Most metals have 2<r< 6.
     
    The uniform electron liquid is defined as:
    The ionic charges of the metal ions are assumed to be smudged out to form a uniform static positive background. In this field the electrons move. If coulomb interactions are ignored we have a free-electron gas.
     
  • r>35 (2D) or 110 (3D): Electron crystal
    Interactions between electrons are dominant. THe electron liquid crystalizes forming a crystalline phase known as the Wigner crystal.
     


     
    Because of the screening of the Coulomb interaction by other electrons (thus weakening it), a free-electron-like model known as the Landau Fermi-Liquid theory works to some extent.
     
    Source:
    http://en.wikipedia.org/wiki/Electron_liquid
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« Last Edit: 27.05.09 at 12:52:31 by Gerrit-Jan Linker »  

Gerrit-Jan Linker
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