Coulomb blockade and the Kondo effect in single-atom transistors

Jiwoong Park, Abhay N. Pasupathy, Jonas I. Goldsmith, Connie Chang, Yuval Yaish, Jason R. Petta, Marie Rinkoski, James P. Sethna, Héctor D. Abruña, Paul L. McEuen () and Daniel C. Ralph
Additional contact information
Jiwoong Park: Cornell University
Abhay N. Pasupathy: Cornell University
Jonas I. Goldsmith: Cornell University
Connie Chang: Cornell University
Yuval Yaish: Cornell University
Jason R. Petta: Cornell University
Marie Rinkoski: Cornell University
James P. Sethna: Cornell University
Héctor D. Abruña: Cornell University
Paul L. McEuen: Cornell University
Daniel C. Ralph: Cornell University

Nature, 2002, vol. 417, issue 6890, 722-725

Abstract: Abstract Using molecules as electronic components is a powerful new direction in the science and technology of nanometre-scale systems1. Experiments to date have examined a multitude of molecules conducting in parallel2,3, or, in some cases, transport through single molecules. The latter includes molecules probed in a two-terminal geometry using mechanically controlled break junctions4,5 or scanning probes6,7 as well as three-terminal single-molecule transistors made from carbon nanotubes8, C60 molecules9, and conjugated molecules diluted in a less-conducting molecular layer10. 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 transition-metal 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.

Date: 2002
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DOI: 10.1038/nature00791

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