Heterocontact Effects in Point Contact Electron-Phonon Spectroscopy of the Alkali Metals.

Abstract

For a small contact between two different materials (a heterocontact), we derive the free electron expression for the electron-phonon spectral function determined from the measured I-V characteristic. The heterocontact spectral function differs strikingly from the homocontact spectral function in that it excludes scattering through angles less than a minimum angle in the larger bandwidth material. We calculate realistic heterocontact spectra for pairs of alkali metals. If in a given pair of alkalis the smaller bandwidth material is replaced by one with a still smaller bandwidth, the size of the signal from the larger bandwidth material decreases (sometimes dramatically), and the part of the spectrum due to scattering by 2k sub F phonons is relatively enhanced. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 15, 1984
Accession Number
ADA149760

Entities

People

  • A. H. Macdonald
  • C. R. Leavens
  • H. U. Baranger

Organizations

  • Cornell Laboratory of Atomic and Solid State Physics

Tags

DTIC Thesaurus Topics

  • Alkali Metals
  • Barriers
  • Boltzmann Equation
  • Electrons
  • Energy
  • Equations
  • Fermi Levels
  • Fermi Surfaces
  • Free Electrons
  • Kinetic Energy
  • Materials
  • Military Research
  • Physics
  • Scattering
  • Solid State Physics
  • Spectroscopy
  • Trajectories

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