Applied Physics A

, Volume 58, Issue 4, pp 389–393 | Cite as

On the sensitivity of positrons to electric fields and defects in MBE-grown silicon structures

  • D. T. Britton
  • P. Willutzki
  • W. Triftshäuser
  • E. Hammerl
  • W. Hansch
  • I. Eisele
Surfaces And Multilayers


The sensitivity of the positron to the internal electric fields in good quality thin (≈100 nm) Molecular Beam Epitaxy (MBE)-grown layers is experimentally demonstrated. Both a thin intrinsic layer grown on a p-type substrate and a highly n-doped δ profile buried in intrinsic silicon form effective barriers to positron diffusion although no defects can be detected. We also extract, from a full treatment of the positron diffusion, a quantitative estimate of the concentration, below the detection limits of other methods, of large vacancy clusters in a thick (680 nm) film.


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Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • D. T. Britton
    • 1
  • P. Willutzki
    • 1
  • W. Triftshäuser
    • 1
  • E. Hammerl
    • 2
  • W. Hansch
    • 2
  • I. Eisele
    • 2
  1. 1.Institut für Nukleare FestkörperphysikUniversität der Bundeswehr MünchenNeubibergGermany
  2. 2.Institut für Physik, Fakultät für ElektrotechnikUniversität der Bundeswehr MünchenNeubibergGermany

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