Lattice dynamics of tetrahedrally bonded boron nitride probed by inelastic X-ray scattering |
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| Affiliation: | 1. Laboratory, ASST Fatebenefratelli Sacco Buzzi, Milan, Italy;2. IRCCS Galeazzi Orthopedic Institute, Milan, Italy;3. Microbiology and Virology Unit, ASST Ospedale San Gerardo, Monza, Italy;4. Division of Gastroenterology, ASST Fatebenefratelli Sacco Buzzi, Milan, Italy;5. Biomedical Department of Internal and Specialized Medicine (DI.BI.M.I.S.), University of Palermo, Palermo, Italy;6. Division of Gastroenterology, Guido Salvini Hospital, Rho, Italy;7. Division of Pathology, ASST della Valtellina e dell''Alto Lario, Sondrio, Italy;8. Humanitas Institute, Milan, Italy;9. Rheumatology Unit, ASST Fatebenefratelli Sacco Buzzi, Milan, Italy |
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| Abstract: | We report experimental results on the lattice dynamics of zincblende and wurtzite boron nitride obtained by inelastic X-ray scattering (IXS) on polycrystalline samples. The generalized vibrational density of states and the orientation averaged longitudinal acoustic phonon dispersion are determined, and the longitudinal and shear sound speeds as well as the Debye temperature are derived. Our results are compared to ab initio lattice dynamics calculations and available elastic and thermodynamic data. |
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