We have used atomic manipulation and scanning tunneling spectroscopy to study the evolution in electronic properties that occurs as two Ni atoms are merged into a single magnetic molecule on Au(111). We observe energetic shifting of molecular d-orbitals and a strong decrease in the molecular Kondo temperature as Ni-Ni separation is reduced to These results are qualitatively explained by a combination of a spin- s-d model and density-functional calculations.
- Received 7 May 2002
- Published 30 December 2002
© 2002 The American Physical Society