The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We present a study of the vibrational properties of the (100) and (110) surfaces of nickel oxide. We performed molecular dynamics simulations over a wide temperature range and we calculated the phonon local density of states (LDOS) of the anionic and cationic sublattices as a function of the distance of the atomic planes from the surface. We discuss the differences observed at T=300K in the phonon LDOS compared to the bulk as well as the differences observed among the two surfaces due to their specific atomic structure. As far as the temperature behavior of the phonon LDOS is concerned for the (100) surface we have preservation of its main characteristics up to high temperatures while for the (110) a modification of the phonon LDOS is observed above T=1000K. The difference in behavior of the two surfaces is related to the stability of the (100) surface and the modification of the atomic structure of the surface planes of the (110) surface above T=1000K.