I am sorry, Murphy's law has just acted. Find the figures here http://www.gnm.cl/emenendez/uploads/Temp/impurity-energy.eps http://www.gnm.cl/emenendez/uploads/Temp/impurity-fermi.eps
Finally, I plotted Energy vs magnetization. Indeed, I have a minimum at total magnetization equal 1. However, the behavior is strange. The plot of E vs M is linear at each side of the minimum, with a kink at M=1. Should'n it be rather like a parable ? Please, see the plots here (above) Eduardo Menendez Departamento de Fisica Facultad de Ciencias Universidad de Chile Phone: (56)(2)9787439 URL: http://fisica.ciencias.uchile.cl/~emenendez -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.democritos.it/pipermail/pw_forum/attachments/20110425/9473060a/attachment.htm