Electronic transport through single conjugated molecules

Journal article


Publication Details

Author(s): Weber HB, Reichert J, Weigend F, Ochs R, Beckmann D, Mayor M
Journal: Chemical Physics
Publisher: ELSEVIER SCIENCE BV
Publication year: 2002
Volume: 281
Journal issue: 2-3
Pages range: 113-125
ISSN: 0301-0104


Abstract


We investigate electronic transport through single conjugated molecules, and compare our data to results of quantum chemical calculations. Conductance spectra of two types of molecules are studied in a metal-molecule-metal junction established using the mechanically controlled break-junction technique. We observe a suppressed conductance at low bias, characteristic step-like features at higher voltages, and strong sample-to-sample fluctuations. We develop a quantum-chemical model for our system using DFT calculations, with the electrodes modelled by small clusters. We consider the effects of different geometries of molecule-metal configurations and bonding as well as finite electric field, and are thereby able to account for the phenomenology of the experimental data. (C) 2002 Elsevier Science B.V. All rights reserved.



FAU Authors / FAU Editors

Weber, Heiko B. Prof. Dr.
Lehrstuhl für Angewandte Physik

Last updated on 2018-14-06 at 21:23