Abstract
We demonstrate by electron energy-loss measurements that the vibrational motion in the physisorption well is dipole active. This is a general phenomenon and data for adsorbed , , and HD reveal a strong nonlinear dependence of the induced dipole moments on displacement. We find that a good estimate of the dipole moment function can be obtained from a van der Waals model.
- Received 31 October 1996
DOI:https://doi.org/10.1103/PhysRevLett.78.2016
©1997 American Physical Society