Kondo coupling of f and conduction electrons is a common feature of f-electron intermetallics. Similar effects should occur in carbon ring systems(metallocenes). Evidence for Kondo coupling in Ce(C8H8)2 (cerocene) and the ytterbocene Cp*2Yb(bipy) is reported from magnetic susceptibility and L_III-edge x-ray absorption spectroscopy. These well-defined systems provide a new way to study the Kondo effect on the nanoscale, should generate insight into the Anderson Lattice problem, and indicate the importance of this often-ignored contribution to bonding in organometallics.
@article{arxiv.cond-mat/0601084,
title = {Self-contained Kondo effect in single molecules},
author = {C. H. Booth and M. D. Walter and M. Daniel and W. W. Lukens and R. A. Andersen},
journal= {arXiv preprint arXiv:cond-mat/0601084},
year = {2007}
}