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Calculate the spin wave dispersion relation for a ferromagnetic heisenberg model

  1. Jan 14, 2013 #1
    1. The problem statement, all variables and given/known data
    Calculate the spin wave dispersion relation Ek for the ferromagnetic heisenberg model with jtot = 1/2
    Assume a 1d square lattice and interactions of strength J between nearest neighbours and zero elsewhere

    2. Relevant equations

    H|k> = [E0 +2jtot[itex]\sum J(r)(1-Exp(ik.r) [/itex]] |k>


    3. The attempt at a solution

    Not really sure where to start :/
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
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