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Atomic electric dipole moment

  1. Aug 27, 2007 #1

    malawi_glenn

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    Hi I was wondering if anyone could give me info about atomic electric dipole moment at a very fundemental level (fenomenological, basic quantum), I do not seem to find it when I google =(

    My Aim is just to understand van der Waals binding in solids a little bit more.
     
  2. jcsd
  3. Aug 27, 2007 #2

    olgranpappy

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    There's a short section about the physical origin of the van der Waals "Fluctuating dipole" forces on page 390 of Ashcroft and Mermin "Solid State Physics". It is a very short section though.

    Also, Chaikin and Lubensky section 1.3.2 on van der Waals is good. Basically, they expand the Hamiltonian for two atoms (electrons and nuclei, whose nuclei are a fixed distance R apart) and do perturbation theory using

    [tex]
    H' = \frac{e^2}{R^3}(x^1x^2+y^1y^2-2z^1z^2)
    [/tex]

    the first order perturbation vanishes and they have to go to second order (thus we see that the perturbation of the energy goes like 1/R^6).

    Actually working out the matrix elements is a little painful even in the case of H atoms, but it can be done in that case.
     
  4. Aug 27, 2007 #3

    malawi_glenn

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    Thanks, I'll check out the library
     
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