THE FERMI SURFACE OF CAESIUM,

Abstract

A study of the de Haas-Van Alphen effect in caesium by the pulsed field method, under carefully controlled experimental conditions, has yielded information about the orientation dependence of the Fermi surface cross-section. A computer analysis of the results in terms of cubic harmonic series has indicated a probable radial distortion of some +3.3% in the (110) direction, -0.9% in the (100) direction, and -1.4% in the (111) direction; this is compared with the predictions of band structure calculations which, though indicating approximately the correct shape of Fermi surface, are appreciably in error as to the magnitude of the deviations from a sphere. The observed Fermi surface distortion is also discussed in terms of its effect on the low temperature thermoelectric power of caesium. The volume of the Fermi surface is found to be within a few tenths of 1% of that calculated from published lattice constant data. Strong variations of signal strength with orientation were observed; these have been attributed in part to the effect of spin-splitting of the Landau levels. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 25, 1965
Accession Number
AD0621598

Entities

People

  • I. M. Templeton
  • Kōichi Okumura

Organizations

  • National Research Council Canada

Tags

DTIC Thesaurus Topics

  • Band Structures
  • Computers
  • Distortion
  • Energy Bands
  • Fermi Surfaces
  • Low Temperature
  • Orientation (Direction)
  • Physical Properties

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Plasma Physics / Magnetohydrodynamics
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.