Disappearance of the Kondo resonance for atomically fabricated cobalt dimers

W. Chen, T. Jamneala, V. Madhavan, M. F. Crommie

Research output: Contribution to journalArticlepeer-review


We have used scanning tunneling spectroscopy and atomic manipulation to study the interaction between a single pair of magnetic atoms at the surface of a nonmagnetic metal. The local electronic structure of cobalt adatoms on Au(111) was measured for different cobalt-cobalt interatomic spacings at T=6 K. Artificially fabricated cobalt dimers are found to show an abrupt disappearance of the Kondo resonance for cobalt-cobalt separations less than 6 Å. This behavior is explained as the result of reduced exchange coupling between gold conduction electrons and ferromagnetic cobalt dimers.

Original languageEnglish (US)
Pages (from-to)R8529-R8532
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number12
StatePublished - 1999
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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