Magnetooptical Studies of the Electronic Structure of Semimetals

  • M. S. Dresselhaus
Chapter
Part of the Nato Advanced Study Institutes Series book series (NSSB, volume 60)

Abstract

Magnetooptical studies provide a powerful tool for the study of the electronic structure of semimetals because of the low effective masses characteristic of this class of materials and because of the consequent ease of satisfying the conditions ωcτ > 1 and ħωc > kT, which are necessary requirements for the observation of resonant magnetooptical effects. The condition (ωCτ > 1 (where ωc is the angular cyclotron frequency \({\omega _{\text{c}}}{\mkern 1mu} = {\mkern 1mu} {\text{eH/m}}_{\text{c}}^*{\text{c, m}}_{\text{c}}^*\) is the cyclotron effective mass and τ is the relaxation time), implies that an electron or hole complete a cyclotron orbit before being scattered. The condition ħωc > kT implies that the characteristic magnetic energy ħωC is large compared with thermal energies, so that distinct Landau levels can be resolved when in competition with thermal broadening effects. In fact, over the years, semimetals have provided important test materials for the development of experimental magnetooptical techniques, as well as theoretical models for quantitative analysis of the experimental results.

Keywords

Brillouin Zone Landau Level Interband Transition Faraday Geometry Band Extremum 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Proc. Int. Conf. Phys. Semimetals and Narrow Gap Semiconductors, ed. D.L. Carter and R.T. Bate (Pergamon Press, New York, 1971), p. 1-193.Google Scholar
  2. 2.
    IBM J. Res. and Develop, 8 (1964).Google Scholar
  3. 3.
    E.E. Mendez, Ph.D. thesis, MIT, June 1979 (unpublished).Google Scholar

Copyright information

© Springer Science+Business Media New York 1980

Authors and Affiliations

  • M. S. Dresselhaus
    • 1
  1. 1.Department of Electrical Engineering & Computer Science and Center for Materials Science and EngineeringMassachusetts Institute of TechnologyCambridgeUSA

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