Raman effect in icosahedral boron-rich solids
| Autor: | V. N. Gurin, Takaho Tanaka, M. M. Korsukova, Andreas Leithe-Jasper, Ulrich S. Schwarz, Volodymyr Filipov, Iwami Higashi, Udo Kuhlmann, Marc Armbrüster, Helmut Werheit, Torsten Lundström |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
010302 applied physics
Materials science Icosahedral symmetry chemistry.chemical_element 02 engineering and technology Boron carbide Physik (inkl. Astronomie) 021001 nanoscience & nanotechnology 01 natural sciences Spectral line chemistry.chemical_compound Tetragonal crystal system symbols.namesake Crystallography chemistry 0103 physical sciences symbols General Materials Science Orthorhombic crystal system Topical Review 0210 nano-technology Raman spectroscopy Boron Raman scattering |
| Zdroj: | Science and Technology of Advanced Materials. 11:023001 |
| ISSN: | 1878-5514 1468-6996 |
| DOI: | 10.1088/1468-6996/11/2/023001 |
| Popis: | We present Raman spectra of numerous icosahedral boron-rich solids having the structure of α-rhombohedral, β-rhombohedral, α-tetragonal, β-tetragonal, YB66, orthorhombic or amorphous boron. The spectra were newly measured and, in some cases, compared with reported data and discussed. We emphasize the importance of a high signal-to-noise ratio in the Raman spectra for detecting weak effects evoked by the modification of compounds, accommodation of interstitial atoms and other structural defects. Vibrations of the icosahedra, occurring in all the spectra, are interpreted using the description of modes in α-rhombohedral boron by Beckel et al. The Raman spectrum of boron carbide is largely clarified. Relative intra- and inter-icosahedral bonding forces are estimated for the different structural groups and for vanadium-doped β-rhombohedral boron. The validity of Badger's rule is demonstrated for the force constants of inter-icosahedral B–B bonds, whereas the agreement is less satisfactory for the intra-icosahedral B–B bonds. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|