ADIABATIC AND NONADIABATIC ELECTRONIC-TRANSITIONS IN BRIDGE-ASSISTED ELECTROCHEMICAL TUNNELING CONTACTS

A theory is developed for processes of bridge-assisted electronic tran sitions between two metals, in which the bridge species interacts with local oscillations or medium-polarization oscillations. These oscilla tions are found to induce a unidirectional electron flow from one meta l to the other. This mechanism is shown to also be true for tunneling bridge-assisted contact of two long molecules. The potential dependenc e of the electric current is calculated.