Scaling analysis of a model Hamiltonian for Ce$^{3+}$ impurity in a cubic metal

Details Scaling analysis of a model Hamiltonian for Ce$^{3+}$ impurity in a cubic metal Scaling analysis of a model Hamiltonian for Ce$^{3+}$ impurity in a cubic metal

1996-03-05

arxiv.org/abs/cond-mat/9603034v2

Physics

Condensed Matter

68 pages. 4 figures are available upon request from tskim@phys.ufl.edu (revised)

Scientific paper

10.1103/PhysRevB.54.6494

We introduce various exchange interactions in a model Hamiltonian for Ce$^{3+}$ ions in cubic symmetry with three configurations ($f^0$,$f^1$,$f^2$). With the impurity pseudo spin $S_I=1/2$, our Hamiltonian includes: (i) One-channel $S_c=1/2$ Anderson model; (ii) Two-channel $S_c=1/2$ Anderson model; (iii) An unforseen one-channel $S_c=3/2$ Anderson model with a non-trivial fixed point; (iv) Mixing exchange interaction between the $\Gamma_{6,7}$ and the $\Gamma_8$ conduction electron partial wave states; (v) Multiple conduction electron partial wave states. Using the third-order scaling (perturbative renormalization group) analysis, we study stability of various fixed points relevant to various exchange interactions for Ce$^{3+}$ ions in cubic symmetry.

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