Memory-Induced Extra Resonances of Adsorbates,

Abstract

The optical absorption profile of an atom-surface vibrational bond is studied. From Markovian relaxation theory it follow that the line shape is a Lorentzian around the adsorbate resonance frequency omega sub 0. Dispersion relations for crystals have fairly small cutoff frequency omega sub D, which prohibits the use of such a simple theory. We calculated the spectral profile with finite memory-time reservoir theory, and we found that the modified Lorentzian vanishes above omega sub D. Also a new spectral line at omega sub 0+ omega sub D is predicted, which disappears in the Markovian limit. The physical origin of the new line is explained. Keywords: Adsorbates; Extra resonances; Memory-induced; Optical absorption profile; Markovian limit; Modified Lorentzian.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1988
Accession Number
ADA192877

Entities

People

  • Henk F. Arnoldus
  • Thomas F. George

Organizations

  • University at Buffalo

Tags

Communities of Interest

  • Advanced Electronics
  • Weapons Technologies

DTIC Thesaurus Topics

  • Absorption
  • Abstracts
  • Air Force
  • Chemical Engineering
  • Chemistry
  • Classification
  • Dipole Moments
  • Dispersion Relations
  • Engineering
  • Materials
  • Materials Science
  • Military Research
  • New York
  • Optical Absorption
  • Solid State Physics
  • United States
  • Universities

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.