Many-Neighbor Treatment of Molecular-Switch Transmission

S. G. Davison, R. A. English, Z. L. Miskovic, F. O. Goodman

Department of Applied Mathematics
University of Waterloo
Waterloo, Ontario
Canada
N2L 3G1

Abstract:

We use the many-neighbor description of a monatomic chain with a single impurity, characterized by long-range couplings, to study the electron transmission properties of a conducting polymer. The transmission probability is obtained by a method, based on the Lippmann-Schwinger equation. Control of the switch operation is facilitated by the presence of a peak in the transmission probability at the impurity site energy for sufficiently weak impurity-chain coupling. We show that this peak becomes rather distorted, when long-range coupling is present in the chain, and provides a more convenient means of switch control.

last updated Sat Oct 20 00:44 EDT 2001 by RAE