Investigations of force constants-relaxation on metal surfaces by measurement of phonon scattering curves using helium atom scattering
Abstract
Abnormal longitudinal lattice vibrations on noble metal surfaces are investigated using helium atom inelastic scattering instead of the previous electron scattering method. Surface physical phenomena are outlined to explain important modifications of force constants. Lattice dynamics is studied in the case of lattice vibrations in three dimensional solids and in crystal layers. A computer program is used for the determination of phonon frequencies. Experimental results are given for the interactions of helium atoms with solid surfaces for Pt, Pd, Al, and Pb.
- Publication:
-
Thesis Max-Planck-Inst. fuer Stroemungsforschung
- Pub Date:
- December 1987
- Bibcode:
- 1987mpi..rept.....W
- Keywords:
-
- Helium Atoms;
- Inelastic Scattering;
- Metal Surfaces;
- Phonons;
- Relaxation (Mechanics);
- Crystal Defects;
- Crystal Lattices;
- Electron Scattering;
- Lattice Vibrations;
- Noble Metals;
- Surface Properties;
- Atomic and Molecular Physics