Abstract
The surface lattice dynamics of Ru(001) has been investigated by a combined first-principles calculation and high-resolution electron-energy-loss spectroscopy. We find very anomalous dispersion curves of low-frequency surface modes and indications of strong softening of longitudinally polarized vibrations. They originate from large modifications of in-plane surface force constants unexpected for such a compact hexagonal surface.
| Original language | English |
|---|---|
| Article number | 161406 |
| Pages (from-to) | 1614061-1614064 |
| Number of pages | 4 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 66 |
| Issue number | 16 |
| State | Published - 15 Oct 2002 |