SOME TRANSPORT-PROPERTIES OF THE 2-CHANNEL KONDO IMPURITY

We consider conduction electrons moving along a ring in two different orbital channels interacting with a spin-1/2 impurity via isotropic sp in exchange. The exchange is the same for both channels, but a crystal line field breaks the orbital symmetry. The tower structure of the fin ite size corrections to the ground state energy is derived from the Be the ansatz equations and used to discuss the Aharonov-Bohm-Casher inte rference pattern in the persistent current and the magnetoresistivity. (C) 1997 American Institute of Physics.