A Many Electron Theory of Localised Moments in Metals

  • K. W. H. Stevens


The Hamiltonian of a typical solid is so complicated that one does not expect to get very far with exact methods. On the other hand, if one tries to split it into an unperturbed part and a perturbation (so that approximation methods can be used) it is very desirable to have the unperturbed part giving a fairly accurate description, so that the effect of the perturbation is small. It is also implied that the unperturbed problem is itself tractable, for there is no point in having an unperturbed Hamiltonian unless one can discuss its properties fairly readily.


Rare Earth Metal Crystal Field Localise Moment Wannier Function Rare Earth Atom 
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Copyright information

© Plenum Press, New York 1976

Authors and Affiliations

  • K. W. H. Stevens
    • 1
  1. 1.Department of PhysicsUniversity of NottinghamNottinghamEngland

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