He atom surface scattering: Surface dynamics of insulators, overlayers and crystal growth
Investigations have focused primarily on surface structure and dynamics of ionic insulators, epitaxial growth onto alkali halide crystals and multiphoton studies. The surface dynamics of RbCl has been re-examined. We have developed a simple force constant model which provides insight into the dynamics of KBr overlayers on NaCl(001), a system with a large lattice mismatch. The KBr/NaCl(001) results are compared to Na/Cu(001) and NaCl/Ge(001). We have completed epitaxial growth experiments for KBr onto RbCl(001). Slab dynamics calculations using a shell model for this system with very small lattice mismatch are being carried out in collaboration with Professor Manson of Clemson University and with Professor Schroeder in Regensburg, Germany. Extensive experiments on multiphoton scattering of helium atoms onto NaCl and, particularly, LiF have been carried out and the theory has been developed to a rather advanced stage by Professor Manson. This work will permit the extraction of more information from time-of-flight spectra. It is shown that the theoretical model provides a very good description of the multiphoton scattering from organic films. Work has started on self-assembling organic films on gold (alkyl thiols/Au(111)). We have begun to prepare and characterize the gold crystal; one of the group members has spent two weeks at the Oak Ridge National Laboratory learning the proper Au(111) preparation techniques. One of our students has carried out neutron scattering experiments on NiO, measuring both bulk phonon and magnon dispersion curves.
- Research Organization:
- Florida State Univ., Tallahassee, FL (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG05-85ER45208
- OSTI ID:
- 7017792
- Report Number(s):
- DOE/ER/45208-8; ON: DE93002788; TRN: 92-038217
- Country of Publication:
- United States
- Language:
- English
Similar Records
He atom-surface scattering: Surface dynamics of insulators, overlayers and crystal growth. Progress report, May 1, 1991--April 30, 1994
He atom-surface scattering: Surface dynamics of insulators, overlayers and crystal growth
Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMIC BEAM DIFFRACTION
FILMS
POTASSIUM BROMIDES
DEPOSITION
PHONONS
RUBIDIUM CHLORIDES
SURFACE PROPERTIES
DIELECTRIC MATERIALS
EPITAXY
GOLD
HELIUM
PROGRESS REPORT
SCATTERING
SODIUM CHLORIDES
THIOLS
ALKALI METAL COMPOUNDS
BROMIDES
BROMINE COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
COHERENT SCATTERING
DIFFRACTION
DOCUMENT TYPES
ELEMENTS
FLUIDS
GASES
HALIDES
HALOGEN COMPOUNDS
MATERIALS
METALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
POTASSIUM COMPOUNDS
QUASI PARTICLES
RARE GASES
RUBIDIUM COMPOUNDS
SODIUM COMPOUNDS
TRANSITION ELEMENTS
360606* - Other Materials- Physical Properties- (1992-)
400101 - Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
665300 - Interactions Between Beams & Condensed Matter- (1992-)