Electron-Rayleigh Wave Interaction in Thin Film Carbons.

Abstract

Sound wave propagation in thin film carbon is investigated in the long wavelength approximation. Strain-free and stress-free boundary conditions lead to the same solution. The Rayleigh wave, with a small damping constant and with polarization perpendicular to the layer planes, has a small sound velocity. Since the long wavelength phonon energies associated with this wave are very small, these phonon are readily excited even at very low temperatures. Furthermore, those phonons strongly scatter carriers at low temperatures. Of particular interest for transport properties is the determination of the carrier relaxation time for very thin film thicknesses. These phonons are also responsible for the temperature dependence of the negative magnetoresistance of pregraphitic carbons at low temperatures. Keywords: Interaction of electrons, Rayleigh waves graphite films, Electron scattering.

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Document Details

Document Type
Technical Report
Publication Date
Oct 30, 1987
Accession Number
ADA191727

Entities

People

  • Kōkichi Sugihara

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Boundaries
  • Crystal Structure
  • Electrons
  • Graphitic Materials
  • Long Wavelengths
  • Low Temperature
  • Magnetoresistance
  • Polarization
  • Rayleigh Waves
  • Scattering
  • Sound Waves
  • Thickness
  • Thin Films
  • Transport Properties
  • Wave Propagation
  • Waves

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Materials Science and Engineering.
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene