Inelastic electron tunneling from a metal tip: The contribution from resonant processes

We present a simple model calculation for electron tunneling between a metal probe tip and a metal surface with a chemisorbed molecule. It is shown that under suitable conditions, resonant tunneling via interaction with a molecule vibration can give a decrease of 10% or more in the total tunneling conductance. Adsorbate systems are suggested where our predictions may be tested. © 1987 The American Physical Society.