Mechanisms for electron transport in atomic-scale one-dimensional wires: Soliton and polaron effects
Department of Physics and Astronomy, University College London
Gower Street, London WC1E 6BT, UK
Accepted: 9 January 2002
We study one-electron tunneling through atomic-scale one-dimensional wires in the presence of coherent electron-phonon (e-ph) coupling. We use a full quantum model for the e-ph interaction within the wire with open boundary conditions. We illustrate the mechanisms of transport in the context of molecular wires subject to boundary conditions imposing the presence of a soliton defect in the molecule. Competition between polarons and solitons in the coherent transport is examined. The transport mechanisms proposed are generally applicable to other one-dimensional nanoscale systems with strong e-ph coupling.
PACS: 73.63.Nm – Quantum wires / 73.40.Gk – Tunneling / 73.61.Ph – Polymers; organic compounds
© EDP Sciences, 2002