Multi-terminal Molecular Wire Systems: A Self-consistent Theory and Computer Simulations of Charging and Transport

Details Multi-terminal Molecular Wire Systems: A Self-consistent Theory and Computer Simulations of Charging and Transport Multi-terminal Molecular Wire Systems: A Self-consistent Theory and Computer Simulations of Charging and Transport

2000-09-25

arxiv.org/abs/cond-mat/0009386v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 8 figures

Scientific paper

10.1103/PhysRevB.62.10451

We present a self-consistent method for the evaluation of the electronic current flowing through a multi-terminal molecular wire. The method is based on Buttiker- Landauer theory which relates the current to one-electron scattering probabilities. The scattering problem is solved using a tight-binding form for Schroedinger's equation that incorporates a self-consistent evaluation of the electro-static potential in the region of the molecular wire. We apply the method to a three-terminal molecular wire connected to metallic leads. The molecular wire is a pi-conjugated carbon chain with thiol end groups, self-assembled on the cleaved edge of a multilayer of alternating thin metal and insulating films. The ends of the chain bond to two outer metal layers that act as source and drain, and the chain bridges a third (inner) metal layer that acts as a gate. We show that transistor action should occur in this device if on the surface of the metal gate there are absorbed atoms that acquire charge as the gate voltage is increased, thereby enhancing the interaction between the gate and molecule and creating a strong potential barrier that hinders electron flow along the molecular wire. We find that electronic solitons play an important role in the response of this system to applied voltages.

Affiliated with

Also associated with

No associations

Rating

Multi-terminal Molecular Wire Systems: A Self-consistent Theory and Computer Simulations of Charging and Transport does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Multi-terminal Molecular Wire Systems: A Self-consistent Theory and Computer Simulations of Charging and Transport, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-terminal Molecular Wire Systems: A Self-consistent Theory and Computer Simulations of Charging and Transport will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-482488