1208.3211 (J. Bauer et al.)

Microscopic resolution of the interplay of Kondo screening and
superconducting pairing    [PDF]

J. Bauer, J. I. Pascual, K. J. Franke

Magnetic molecules adsorbed on a superconductor give rise to a local competition of Cooper pair and Kondo singlet formation inducing subgap bound states. For manganese-phthalocyanine molecules on a Pb(111) substrate, featuring numerous different Kondo scales, such states are resolved by scanning tunneling spectroscopy. We show that numerical renormalization group calculations for an effective one channel Anderson impurity model explain the energy and weight of the bound states very well. The application of the model and its parameters are justified by scaling arguments.

View original: http://arxiv.org/abs/1208.3211