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Magneto-Optical Study of Shallow Donors in Transmutation-Doped GaAs

  • J. H. M. Stoelinga
  • D. M. Larsen
  • W. Walukiewicz
  • R. L. Aggarwal
  • C. O. Bozler

Abstract

Lineshapes and peak positions of ls→2p-1 donor transitions in epitaxial GaAs samples of relatively low compensation have been studied as functions of magnetic field by use of photoconductivity measurements. Some of these samples were produced by transmutation doping using thermal neutrons—a method which is useful for the controlled introduction of donor impurities in GaAs. Two new effects, tentatively attributed to van der Waals interactions between neutral donor atoms, are observed: (1) although both Se and Ge donors are introduced by thermal neutron transmutation, the Se line is much broader than the Ge line, and (2) deviations from isolated donor behavior occur in the magnetic field dependence of the chemical shift of the shallowest donor present. The separation of lines from two deeper donors, Ge and Si, verified the simple phenomenological theory of the magnetic field dependence of central cell corrections of isolated donors up to at least 10 T.

Keywords

Thermal Neutron Magnetic Field Dependence Shallow Donor Donor Impurity Deep Donor 
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.

Copyright information

© Plenum Press, New York 1979

Authors and Affiliations

  • J. H. M. Stoelinga
    • 1
  • D. M. Larsen
    • 1
  • W. Walukiewicz
    • 1
  • R. L. Aggarwal
    • 1
    • 3
  • C. O. Bozler
    • 2
  1. 1.Mass. Institute of Tech.CambridgeUSA
  2. 2.M.I.T. Lincoln LaboratoryLexingtonUSA
  3. 3.Department of PhysicsM.I.T.USA

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