Strong Coupling Approach to the Supersymmetric Kondo Model
arXiv:cond-mat/0001002 · doi:10.1016/S0550-3213(00)00419-3
Abstract
We carry out the strong coupling expansion for the SU(N) Kondo model where the impurity spin is represented by a L-shaped Young tableau. Using second order perturbation theory around the strong coupling fixed point it is shown that when the antisymmetric component of the Young-tableau contains more than N/2 entries, the strong-coupling fixed point becomes unstable to a two-stage Kondo effect. By comparing the strong coupling results obtained here with the result using a supersymmetric large N expansion, we are also able to confirm the validity of the the supersymmetric formalism for mixed symmetry Kondo models.
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References in corpus (1)
Cited by in corpus (6)
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- Supersymmetric Hubbard Operators
- Intermediate coupling fixed point study in the overscreened regime of generalized multichannel SU(N) Kondo models
- Fermi surface enlargement on the Kondo lattice
- Transition from a strong-coupling fixed point to an intermediate-coupling fixed point in a single-channel SU(N) Kondo model: role of the filling and two-stage screening
- Atomic Model of Susy Hubbard Operators