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APS » Journals » Phys. Rev. B » Volume 66 » Issue 21
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Phys. Rev. B 66, 212411 (2002) [4 pages]

Observation of spectral evolution during the formation of a Ni2 Kondo molecule

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V. Madhavan, T. Jamneala, K. Nagaoka, W. Chen*, Je-Luen Li, Steven G. Louie, and M. F. Crommie
Department of Physics, University of California at Berkeley, Berkeley, California 94720-7300
Materials Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California 94720-7300

Received 7 May 2002; published 30 December 2002

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 3.4±0.3Å. These results are qualitatively explained by a combination of a spin-1/2 s-d model and density-functional calculations.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.66.212411
DOI:
10.1103/PhysRevB.66.212411
PACS:
73.22.-f, 75.25.+z, 75.75.+a

*Present address: Condensed Matter Physics, Caltech 114-36, Pasadena, California 91125.

 
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