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Homework Help: Spin glass for ferromagnetic systems

  1. Dec 20, 2009 #1
    1. The problem statement, all variables and given/known data
    hamiltonian is given by H=-[tex]\sum [/tex] Jij si sj
    so interaction constants are Jij=EiEj and Ei=+1,-1
    si=+1,-1 randomly , they are spin variables.
    the question is :
    show that this system is equivalent to a ferromagnet, by redefining the spin variables.
    3. The attempt at a solution

    first of all i am not sure but Jij should be less than zero. If i know the definiton of ferromagnetic system , i can change the spin variables into an appropriate form. but far now i couldn't find anyhing
    So any tip or lead would be nice to start with.
    thanks
     
    Last edited: Dec 20, 2009
  2. jcsd
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