ENHANCED HELIUM-ATOM SCATTERING FROM LONGITUDINAL SURFACE PHONONS IN CU(001)

Authors
BENEDEK G ELLIS J LUO NS REICHMUTH A RUGGERONE P TOENNIES JP
Citation
G. Benedek et al., ENHANCED HELIUM-ATOM SCATTERING FROM LONGITUDINAL SURFACE PHONONS IN CU(001), Physical review. B, Condensed matter, 48(7), 1993, pp. 4917-4920
Citations number
23
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
48
Issue
7
Year of publication
1993
Pages
4917 - 4920
Database
ISI
SICI code
0163-1829(1993)48:7<4917:EHSFLS>2.0.ZU;2-T
Abstract
Inelastic helium-atom scattering from Cu(001) shows giant intensities for the longitudinal-surface-phonon resonance. This effect, most prono unced in the [100] direction and not visible with electron-energy-loss spectroscopy, indicates a very large anisotropic deformability of con duction electrons against the longitudinal modes of surface atoms. Its size and anisotropy are well accounted for by a pseudo-charge model f or surface dynamics.