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EnglishWe present a molecular-dynamics analysis of the stable non-melting (100) and (111) surfaces of Al. An expansion of (111) surface and a contraction of (100) surface result from the calculations. At low temperature, the vertical mean-square vibrational amplitude is larger than the in-plane component, while at higher temperature the in-plane component approaches the vertical one. The evaluated linewidths and the energy shifts for the Rayleigh surface phonon are in good agreement with the He-surface scattering data. The effect of surface anharmonicity is much larger for the static properties than for the dynamical properties.--Presentazione poster by R Zivieri - Conferenza nazionale
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| Titolo: | Anharmonicity on Al(100) and Al(111) surfaces -- Presentazione poster by R Zivieri - Conferenza nazionale |
| Autori: | |
| Data di pubblicazione: | 1999 |
| Abstract: | We present a molecular-dynamics analysis of the stable non-melting (100) and (111) surfaces of Al. An expansion of (111) surface and a contraction of (100) surface result from the calculations. At low temperature, the vertical mean-square vibrational amplitude is larger than the in-plane component, while at higher temperature the in-plane component approaches the vertical one. The evaluated linewidths and the energy shifts for the Rayleigh surface phonon are in good agreement with the He-surface scattering data. The effect of surface anharmonicity is much larger for the static properties than for the dynamical properties.--Presentazione poster by R Zivieri - Conferenza nazionale |
| Handle: | http://hdl.handle.net/11392/1725333 |
| Appare nelle tipologie: | 04.3 Abstract (Riassunto) in convegno in Rivista/Volume |
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