Site-directed deep electronic tunneling through a molecular network

Electronic tunneling in a complex molecular network of N (> 2) donor/ acceptor sites, connected by molecular bridges, is analyzed. The deep tunneling dynamics is formulated using a recursive perturbation expansion, yielding a McConnell- type reduced N- level model Hamiltonian. Applications to models of molecular junctions demonstrate that the donor- bridge contact parameters can be tuned in order to control the tunneling dynamics and particularly to direct the tunneling pathway to either one of the various acceptors. (c) 2005 American Institute of Physics.