| Автор | M Persson |
| Автор | Joseph A Stroscio |
| Автор | W Ho |
| Дата выпуска | 1987-09-01 |
| dc.description | It is shown by surface lattice dynamics that a new type of surface vibrational resonance arises in those frequency regions where there is a strong depletion in the bulk phonon density of states. The presence of these pseudoband gaps is due to the higher Fourier components in the phonon dispersion relations introduced by the particular coordination of atoms in layers parallel to the surface. A quantitative analysis based on surface lattice dynamics of the recorded electron energy loss spectra of Cu and Ni suggests that the outermost surface interlayer force constant is rather close to the bulk value. This resonance is found to exist throughout the Gamma̅X̅ direction and makes an avoided crossing with a resonance derived from a band gap at the X̅-point. An explanation is given for the disappearance of the divergent van Hove singularities in the projected bulk density of states upon projection on a surface layer. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Geometric structure, pseudoband gaps, and surface vibrational resonances on metal surfaces |
| Тип | paper |
| DOI | 10.1088/0031-8949/36/3/030 |
| Electronic ISSN | 1402-4896 |
| Print ISSN | 0031-8949 |
| Журнал | Physica Scripta |
| Том | 36 |
| Первая страница | 548 |
| Последняя страница | 558 |
| Аффилиация | M Persson; Laboratory of Atomic and Solid State Physics and Materials Science Center, Cornell University, Ithaca, New York 14853-2501, USA |
| Аффилиация | Joseph A Stroscio; Laboratory of Atomic and Solid State Physics and Materials Science Center, Cornell University, Ithaca, New York 14853-2501, USA |
| Аффилиация | W Ho; Laboratory of Atomic and Solid State Physics and Materials Science Center, Cornell University, Ithaca, New York 14853-2501, USA |
| Выпуск | 3 |
