Metodos analiticos em sistemas fortemente correlacionados unidimensionais : um estudo da rede de Kondo por bosonização e da cadeia de Heisenberg pelo anstaz de Bethe

AUTOR(ES)
DATA DE PUBLICAÇÃO

2001

RESUMO

In this thesis, we studied the one-dimensional Kondo lattice model with abelian bosonization and the Heisenberg chain with the Bethe ansatz. We connected the Kondo lattice with the cooperative Jahn-Teller and with the 2 Luttinger liquids interacting by hopping. The main technique used was the renormalization group for the generalized Coulomb gas, that is obtained when we integrate the bosonic degrees of freedom. We explained the phase diagrams for the Ising-Kondo chain and the Kondo lattice, for ferromagnetic and anti-ferromagnetic coupling. Finally, we studied the Bethe solutions for the finite and thermodynamic Heisenberg chain

ASSUNTO(S)

mecanica quantica magnetismo kondo efeito problema de muitos corpos

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