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Controlling quantum transport through a single molecule

Controlling quantum transport through a single molecule. Charles A. Stafford, University of Arizona, DMR-0312028. A new device concept, the Quantum Interference Effect Transistor (QuIET), is proposed. Perfect destructive interference due to molecular symmetry stops current in off state .

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Controlling quantum transport through a single molecule

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  1. Controlling quantum transport through a single molecule Charles A. Stafford, University of Arizona,DMR-0312028 A new device concept, the Quantum Interference Effect Transistor (QuIET), is proposed. Perfect destructive interference due to molecular symmetry stops current in off state. Decoherence/scattering introduced by a third lead allows current to flow. Current controlled by regulating interference, not by raising and lowering an energy barrier. Artist’s conception of a QuIET. Colored spheres represent individual carbon (green), hydrogen (purple), sulfur (yellow), and gold (gold) atoms. Voltage applied to the leftmost contact regulates current between the other two. David M. Cardamone, CAS & S. Mazumdar, cond-mat/0508407; cond-mat/0503540.

  2. Controlling quantum transport through a single molecule Charles A. Stafford, University of Arizona,DMR-0312028 Broader impact QuIET reproduces functionality of macroscopic transistors on the scale of a single molecule. New concept overcomes fundamental problems of power dissipation and environmental sensitivity that beset many nanoscale device proposals. In the News This invention was featured in ``Honey, I Shrunk the PC,’’ by Mark Anderson (Wired, June 9, 2005) and in ``New look for molecular transistors,’’ by Dr. Isabelle Dumé (PhysicsWeb, March 31, 2005). Education Graduate student David M. Cardamone contributed to this work. Cardamone received his Ph.D. in August 2005, and is currently a postdoc at Simon-Fraser University.

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