Fermi Liquid Theory on the Basis of Periodic Anderson Hamiltonian with Orbital Degeneracy : Condensed Matter and Statistical Physics

概要

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The Fermi liquid theory on the basis of the periodic Anderson Hamiltonian is extended to the case with orbital degeneracy. The general expressions for T-linear term of specific heat, spin and orbital susceptibilities and T^2-term of resistivity are derived. These results confirm that the general relations derived for the single orbital case hold also in the degenerate case, though they are given in matrix forms. For example, the T-2-term of resistivity is proportional to the square of the mass enhancement factor, when the Coulomb repulsion is large enough to suppress the charge fluctuation of f-electrons. Moreover, it is shown that f-orbital degeneracy suppresses the magnetic instability and the Fermi liquid theory can be applied to a larger value of U compared with the single orbital case.
理論物理学刊行会の論文
1987-05-25