The Quantum Interference Effect Transistor

Details The Quantum Interference Effect Transistor The Quantum Interference Effect Transistor

2005-03-22

arxiv.org/abs/cond-mat/0503540v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

A provisional patent application has been filed for this invention

Scientific paper

We propose a new type of molecular transistor, the Quantum Interference Effect Transistor (QuIET), based on tunable current suppression due to quantum interference. We show that any aromatic hydrocarbon ring has two-lead configurations for which current at small voltages is suppressed by destructive interference. A transistor can be created by providing phase relaxation or decoherence at a site on the ring. We propose several molecules which could tunably introduce the necessary dephasing or decoherence, as well as a proof of principle using a scanning tunneling microscope tip. Within the self-consistent Hartree-Fock approximation, the QuIET is shown to have characteristics strikingly similar to those of conventional field effect and bipolar junction transistors.

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