Publication Type
Journal
Journal Name
Physical Review B
Publication Date
Page Number
155443
Volume
80
Issue
15
Abstract
We use a unique combination of first principles many-body methods and the numerical
renormalization-group technique to study the Kondo regime of cobalt-porphyrin compounds
adsorbed on a Cu(111) surface. We find the Kondo temperature to be highly sensitive to both
molecule charging and distance to the surface, which can explain the variations observed in
recent scanning tunneling spectroscopy measurements. We discuss the importance of manybody
effects in the molecular electronic structure controlling this phenomenon and suggest
scenarios where enhanced temperatures can be achieved in experiments.
