Dipole Active Surface Vibrational Resonances on Clean and Hydrogen Covered Ni(110).

Abstract

A vibrational resonance of the surface metal atoms on the clean Ni(110) surface is observed by electron energy loss spectroscopy. The dipole coupling arises from the incomplete screening of the moving ion cores by the conduction electrons in the surface region. Surface lattice dynamical calculations are in excellent agreement with the measured spectra for the clean surface and show that there are no significant deviations in the surface force constant from the bulk value. This resonance results from a pseudo band gap in the longitudinal bulk phonon dispersion relation along the (110) direction. On the (1x2) reconstructed surface induced by hydrogen chemisorption, a dramatic decrease in intensity of the resonance is observed.

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Document Details

Document Type
Technical Report
Publication Date
Feb 11, 1985
Accession Number
ADA150546

Entities

People

  • J. A. Stroscio
  • M. Persson
  • S. Bare
  • W Ho

Organizations

  • Cornell Laboratory of Atomic and Solid State Physics

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Band Gaps
  • Brillouin Zones
  • Crystal Lattices
  • Crystal Structure
  • Diffraction
  • Dispersion Relations
  • Electron Energy
  • Energy Bands
  • Frequency
  • Materials
  • Materials Science
  • Measurement
  • Neutron Scattering
  • Scattering
  • Solid State Physics
  • Spectra
  • Vibrational Spectra

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Regression Analysis.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene