We outline key elements of a theory that accounts for anomalous properties of the PuCoGa5 and PuRhGa5 compounds as a consequence of a two-body interference between two Kondo screening channels. Virtual valence fluctuations of the magnetic Pu configurations create two conduction channels of different symmetry. Using the symplectic-large N approach, we are able to demonstrate our pairing mechanism in an exactly solvable large N limit. The critical temperature reaches its maximum when the energy levels of excited valence configurations are almost degenerate. The symmetry of the order parameter is determined by the product of the Wannier form factors in the interfering conduction channels.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
- Heavy fermion superconductivity
- Kondo lattice
- Valence fluctuations