Observation of Structure-Induced Surface Vibrational Resonances on Metal Surfaces

Joseph A. Stroscio; M. Persson; Simon R. Bare; W. Ho

doi:10.1103/PhysRevLett.54.1428

Observation of Structure-Induced Surface Vibrational Resonances on Metal Surfaces

Joseph A. Stroscio, M. Persson, Simon R. Bare, and W. Ho

Phys. Rev. Lett. 54, 1428 – Published 1 April 1985

Abstract

A new kind of dipole-active surface vibrational resonance has been observed on (110) surfaces of Cu and Ni by electron-energy-loss spectroscopy. An analysis based on lattice dynamics suggests that such resonances should be observable on surfaces where a single bulk-phonon dispersion relation has a pseudo band gap in the probed phonon density of states. In the [110] direction of facecentered-cubic metals this gap is due to the particular geometric structure in that direction.

Received 9 October 1984

DOI:https://doi.org/10.1103/PhysRevLett.54.1428

Authors & Affiliations

Joseph A. Stroscio, M. Persson^*, Simon R. Bare^†, and W. Ho

Laboratory of Atomic and Solid State Physics and Materials Science Center, Cornell University, Ithaca, New York 14853

^*On leave from Institute of Theoretical Physics, Chalmers University of Technology, S-412 96 Goteborg, Sweden.
^†Present address: Materials and Molecular Research Division, Lawrence Berkeley Laboratory, Berkeley, Cal. 94720.