Inelastic electron tunneling via molecular vibrations in single-molecule transistors

Abstract

In single-molecule transistors, we observe inelastic cotunneling features that correspond energetically to vibrational excitations of the molecule, as determined by Raman and infrared spectroscopy. This is a form of inelastic electron tunneling spectroscopy of single molecules, with the transistor geometry allowing in-situ tuning of the electronic states via a gate electrode. The vibrational features shift and change shape as the electronic levels are tuned near resonance, indicating significant modification of the vibrational states. When the molecule contains an unpaired electron, we also observe vibrational satellite features around the Kondo resonance.

5 pages, 4 figures. Supplementary information available upon request

References in corpus (1)

• The Kondo effect in C${}_{60}$ single-molecule transistors

Cited by in corpus (8)

• Current-induced nonequilibrium vibrations in single-molecule devices
• Kondo resonances and anomalous gate dependence of electronic conduction in single-molecule transistors
• Vibrational Sidebands and Kondo-effect in Molecular Transistors
• Quantum transport through a deformable molecular transistor
• Effects of charge-dependent vibrational frequencies and anharmonicities in transport through molecules
• Three-terminal scanning tunneling spectroscopy of suspended carbon nanotubes
• Josephson current through a molecular transistor in a dissipative environment
• Magnetoconductance through a vibrating molecule in the Kondo regime