The Kondo Effect in C60 Single-Molecule Transistors

2003/10/27 by Lam H. Yu, L. H. Yu, Douglas Natelson +1 · 29 citations
Engineering · Materials Science · Physics and Astronomy · #Graphene research and applications #Molecular Junctions and Nanostructures #Quantum and electron transport phenomena #cond-mat.mes-hall #cond-mat.str-el

paper · pdf · doi:10.1021/nl034893f

published as Nano Lett. 4, 79 (2004) · 5 pages, four figures. Submitted to Nano Letters

arxiv created 2003/10/27 · openalex publication_date 2003/12/09 · arxiv updated 2009/12/01 · openalex created_date 2017/06/09 · openalex updated_date 2026/07/28

Abstract

We have used an electromigration technique to fabricate C 60 -based single-molecule transistors. We detail the process statistics and the protocols used to infer the successful formation of a single-molecule transistor. At low temperatures each transistor acts as a single-electron device in the Coulomb blockade regime. Resonances in the differential conductance indicate vibrational excitations consistent with a known mode of C 60 . In several devices we observe conductance features characteristic of the Kondo effect, a coherent many-body state comprising an unpaired spin on the molecule coupled by exchange to the conduction electrons of the leads. The inferred Kondo temperature typically exceeds 50 K, and signatures of the vibrational modes persist into the Kondo regime.

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