Abstract
The mean-square displacements of atoms in a face-centered cubic crystal have been calculated as a function of distance from a free surface using the harmonic approximation in the high-temperature limit. The procedure is based on the inversion of the dynamical matrix. Calculations have been made for the (100), (110), and (111) surfaces using a nearest-neighbor central-force model for crystals up to 30 layers thick. The force constants for surface atoms are assumed to be the same as those in the interior. The mean-square displacements increase monotonically from the middle of the crystal to the surface. Anisotropy of the meansquare displacement components is found for the surface atoms in each plane considered. The theoretical results are compared with recent low-energy electron-diffraction data on nickel single crystals.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
