Surface-phonon dispersion curves of KBr(001) via helium-atom scattering: Comparison with calculations
A helium-atom surface-scattering instrument, employing a time-of-flighttechnique to observe inelastically scattered He atoms, has been used to measurethe surface-phonon dispersion curves of the KBr(001) surface. Data werecollected in the two high-symmetry directions, <100> and<110>, over the entire Brillouin zone for a target temperatureof /similar to/115 K and incident He wave vector /ital k//sub /ital i//approx.7A/sup /minus/1/. The results show important differences from sometheoretical predictions of shell-model calculations that use parametersobtained by fitting bulk dispersion curves. In addition, the measured surfacedispersion curves of KBr and of RbCl (reported previously) deviate from''mirror-symmetry'' behavior, unlike their bulk dispersion curves.
- Research Organization:
- Department of Physics and Center for Materials Research and Technology, Florida State University, Tallahassee, Florida 32306(US); Department of Chemistry and Center for Materials Research and Technology, Florida State University, Tallahassee, Florida 32306
- OSTI ID:
- 6137005
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Vol. 39:17
- Country of Publication:
- United States
- Language:
- English
Similar Records
Surface phonon dispersion curves via thermal energy atom scattering: He atoms on RbCl(001) surface
Investigation of epitaxial growth via high-resolution helium atom scattering: KBr onto RbCl(001)
Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HELIUM
COLLISIONS
POTASSIUM BROMIDES
ATOM COLLISIONS
PHONONS
BRILLOUIN ZONES
DISPERSION RELATIONS
LATTICE VIBRATIONS
SURFACE PROPERTIES
ALKALI METAL COMPOUNDS
BROMIDES
BROMINE COMPOUNDS
ELEMENTS
FLUIDS
GASES
HALIDES
HALOGEN COMPOUNDS
NONMETALS
POTASSIUM COMPOUNDS
QUASI PARTICLES
RARE GASES
ZONES
656003* - Condensed Matter Physics- Interactions between Beams & Condensed Matter- (1987-)