Published December 2007
| Version v1
Journal article
Neutron scattering study of phonon dynamics on type-I Clathrate Ba8Ga16Ge30
- 1. National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568 (Japan)
- 2. Institute for Solid State Physics, University of Tokyo, 106-1 Shirakata, Tokai, Ibaraki 319-1106 (Japan)
- 3. Hiroshima University, Higashi-Hiroshima, 739-8530 Hiroshima (Japan)
Description
Phonon dynamics of type-I clathrates Ba8Ga16Ge30 has been studied at room temperature by inelastic neutron scattering for energy less than 9 meV. Optical phonons associated with large vibrations of Ba atoms filled in large tetrakaidecahedral cages are observed around E = 4.5 meV. Analysis based on a Born-Von Karman force model shows that the longitudinal force constants between the Ba atoms and the oversized cages has a relatively small value of 0.011 ∼ 0.014 mdyn194. The results indicate that the Ba atoms are very loosely bound to the surrounding oversized cages that consist of Ga and Ge atoms
Additional details
Identifiers
Publishing Information
- Journal Title
- Journal of Physics. Conference Series (Online)
- Journal Volume
- 92
- Journal Issue
- 1
- Journal Page Range
- p. 012169
- ISSN
- 1742-6596
Conference
- Title
- 12. international conference on phonon scattering in condensed matter
- Acronym
- PHONONS 2007
- Dates
- 15-20 Jul 2007
- Place
- Paris (France)
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39039959
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ATOMS; BARIUM; CLATHRATES; GALLIUM; GERMANIUM; INELASTIC SCATTERING; INTERMETALLIC COMPOUNDS; NEUTRON DIFFRACTION; PHONONS; TEMPERATURE DEPENDENCE
- Descriptors DEC
- ALKALINE EARTH METALS; ALLOYS; COHERENT SCATTERING; DIFFRACTION; ELEMENTS; METALS; QUASI PARTICLES; SCATTERING