Conductance-Driven Kondo Effect in a Single Cobalt Atom
  A low-temperature scanning tunneling microscope is employed to build a junction comprising a Co atom bridging a copper-coated tip and a Cu(100) surface. An Abrikosov-Suhl-Kondo resonance is evidenced in the differential conductance and its width is shown to vary exponentially with the ballistic conductance regardless of the tip structure. Using a theoretical description based on the Anderson model, we show that the Kondo effect and the conductance are related through the atomic relaxations affecting the environment of the Co atom. 
D-J. Choi, M. V. Rastei, P. Simon, and L. Limot
cond-mat.mes-hall cond-mat.mtrl-sci cond-mat.str-el