Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2004-05-24
Nanotechnology 15, S517 (2004)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
15 pages, 8 figures. To appear in Oct. 2004 issue of Nanotechnology, proceedings of International Conference on Nanoscale Devi
Scientific paper
10.1088/0957-4484/15/10/004
We report two examples of transport phenomena based on sharp features in the effective density of states of molecular-scale transistors: Kondo physics in C$_{60}$-based devices, and gate-modulated negative differential resistance (NDR) in ``control'' devices that we ascribe to adsorbed contamination. We discuss the need for a statistical approach to device characterization, and the criteria that must be satisfied to infer that transport is based on single molecules. We describe apparent Kondo physics in C$_{60}$-based single-molecule transistors (SMTs), including signatures of molecular vibrations in the Kondo regime. Finally, we report gate-modulated NDR in devices made without intentional molecular components, and discuss possible origins of this property.
Natelson Douglas
Yu Lam H.
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