Coulomb blockade and the kondo effect in single-atom transistors

Jiwoong Park, Abhay N. Pasupathy, Jonas I. Goldsmith, Connie Chang, Yuval Yalsh, Jason R. Petta, Marie Rinkoski, James P. Sethna, Hector D. Abruña, Paul L. McEuen, Daniel C. Ralph

Research output: Contribution to journalArticlepeer-review

1827 Scopus citations


Using molecules as electronic components is a powerful new direction in the science and technology of nanometre-scale systems. Experiments to date have examined a multitude of molecules conducting in parallel, or, in some cases, transport through single molecules. The latter includes molecules probed in a two-terminal geometry using mechanically controlled break junctions or scanning probes as well as three-terminal singlemolecule transistors made from carbon nanotubes, C60 molecules, and conjugated molecules diluted in a less-conducting molecular layer. The ultimate limit would be a device where electrons hop on to, and off from, a single atom between two contacts. Here we describe transistors incorporating a transitionmetal complex designed so that electron transport occurs through well-defined charge states of a single atom. We examine two related molecules containing a Co ion bonded to polypyridyl ligands, attached to insulating tethers of different lengths. Changing the length of the insulating tether alters the coupling of the ion to the electrodes, enabling the fabrication of devices that exhibit either single-electron phenomena, such as Coulomb blockade, or the Kondo effect.

Original languageEnglish (US)
Pages (from-to)722-725
Number of pages4
Issue number6890
StatePublished - Jun 13 2002

All Science Journal Classification (ASJC) codes

  • General


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