Quantum interference effects in single molecules

Electrical connections can now been made with a single molecule. In the research, scientists want to demonstrate the effects of quantum interference on the conduction of single molecules. Conduction, the movement of electrons through a molecule, becomes more difficult if the electron wave functions are in a state of destructive interference, i.e. if they cancel each other out. In a state of constructive interference the electron wave functions completely reinforce each other and optimal conduction occurs.

Programme leader professor Herre van der Zant (Delft University of Technology): "The research into interference effects at the level of single molecules is still in its infancy. Although many predictions have been made little data is available at present. Besides the fundamental understanding, one of the main challenges in nanotechnology is utilising insights about organic molecules for applications in electronic devices."

In this research Van der Zant is collaborating with Jan van Ruitenbeek and Sense Jan van der Molen (both LEI) and with Ferdinand Grozema and Jos Thijssen (both Delft University of Technology).