Transport in single-molecule transistors: Kondo physics and negative differential resistance

Abstract

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.

15 pages, 8 figures. To appear in Oct. 2004 issue of Nanotechnology, proceedings of International Conference on Nanoscale Devices and Systems Integration

References in corpus (8)

• Kondo Physics in a Single Electron Transistor
• A Tunable Kondo Effect in Quantum Dots
• Measurement of the conductance of a hydrogen molecule
• Driving current through single organic molecules
• Fano Resonances in Electronic Transport through a Single Electron Transistor
• The Kondo effect in C${}_{60}$ single-molecule transistors
• Negative Differential Resistance in the Scanning Tunneling Spectroscopy of Organic molecules
• Current-Driven Conformational Changes, Charging and Negative Differential Resistance in Molecular Wires

Cited by in corpus (12)

• Kondo Effect in Electromigrated Gold Break Junctions
• Effects of electron-phonon interaction on non-equilibrium transport through single-molecule transistor
• Green's function methods for single molecule junctions
• Fabrication of Nano-Gapped Single-Electron Transistors for Transport Studies of Individual Single-Molecule Magnets
• Coulomb blockade in electron transport through a C${}_{60}$ molecule from first principles
• Nuclear wave function interference in single-molecule electron transport
• Spatial and temporal propagation of Kondo correlations
• Quantum state readout of individual quantum dots by electrostatic force detection
• Phonon-assisted Kondo Effect in a Single-Molecule Transistor out of Equilibrium
• Electronic conduction in a three-terminal molecular transistor
• Mechanism of Enhanced Rectification in Unimolecular Borromean Ring Devices
• Origin of negative differential resistance in molecular junctions of Rose Bengal