Session L2: Single Molecule Transistors and Graphene Quantum Dots

2:30 PM–5:30 PM, Tuesday, March 22, 2011
Room: Ballroom A2

Sponsoring Unit: DCMP
Chair: Daniel Ralph, Cornell University

Abstract ID: BAPS.2011.MAR.L2.3

Abstract: L2.00003 : Orbital Gating of Single Molecule Transistors

3:42 PM–4:18 PM

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  Mark Reed
    (Yale University)

Electron devices containing molecules as the active region have been an active area of research over the last few years. In molecular-scale devices, a longstanding challenge has been to create a true three-terminal device; e.g., one that operates by modifying the internal energy structure of the molecule, analogous to conventional FETs. Here we report the observation of such a solid-state molecular device, in which transport current is directly modulated by an external gate voltage. We have realized a molecular transistor made from the prototype molecular junction, benzene dithiol, and have used a combination of spectroscopies to determine the internal energetic structure of the molecular junction. Resonance-enhanced coupling to the nearest molecular orbital is revealed by electron tunneling spectroscopy, demonstrating for the first time direct molecular orbital gating in a molecular electronic device.

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