Cotunneling model for current-induced events in molecular wires.
Many phenomena in molecular transport junctions involve transitions between electronic states of the molecular wire, and, therefore, cannot be described adequately using the Landauer picture. We present a model for cotunneling processes in molecular wires. These are coherent second-order processes that can be observed at low temperatures. As an example, we consider the STM-induced dissociation of acetylene. The large voltage threshold for dissociation observed experimentally is naturally accounted for within the cotunneling model.
Hansen
Thorsten
T
Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, USA. thorsten@chem.northwestern.edu
Mujica
Vladimiro
V
Ratner
Mark A
MA
D000114:Acetylene / Q000737:chemistry; D004563:Electrochemistry / Q000379:methods; D004566:Electrodes; D004583:Electrons; D007700:Kinetics; D015233:Models, Statistical; D053758:Nanoparticles / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods; D053770:Nanowires / Q000737:chemistry*; D013696:Temperature; D013816:Thermodynamics
D000114:Acetylene