Observation of the Sliding Mode in Incommensurate Intergrowth Compounds: Brillouin Scattering from the Inclusion Compound of Urea and Heptadecane
| Autor: | Sander van Smaalen, Kenneth D. M. Harris, C. Haas, Jan L. de Boer, Detlef Schmicker |
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| Jazyk: | angličtina |
| Rok vydání: | 1995 |
| Předmět: |
EXCITATIONS
Heptadecane Materials science Condensed matter physics business.industry SYMMETRY General Physics and Astronomy Inclusion compound chemistry.chemical_compound Optics chemistry Brillouin scattering Computer Science::Sound Condensed Matter::Superconductivity Urea Condensed Matter::Strongly Correlated Electrons CRYSTAL PHASES Elasticity (economics) Phason Anisotropy business |
| Zdroj: | Physical Review Letters, 74(5), 734-737. AMER PHYSICAL SOC |
| ISSN: | 0031-9007 |
| Popis: | The anisotropy of the speeds of sound is reported for the incommensurate heptadecane/urea inclusion compound as measured by Brillouin scattering. In addition to the three normal acoustic modes, the results show the presence of a fourth sound velocity, corresponding to the so-called sliding mode (phason). A simple model for the elasticity of incommensurate crystals is used to discuss the polarizations of the sliding mode and the other acoustic modes. |
| Databáze: | OpenAIRE |
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