Ionization mechanisms of aluminum acceptor impurity in silicon

  • T. N. Mamedov
  • D. G. Andrianov
  • D. Herlach
  • V. N. Gorelkin
  • A. V. Stoikov
  • U. Zimmermann
Atoms, Spectra, Radiations


Processes of ionization of shallow acceptor centers (ACs) in silicon are studied. In crystalline silicon samples with phosphorus (1.6×1013, 2.7×1013, and 2.3×1015cm−3) and boron (1.3×1015cm−3) impurities, μAl impurity atoms were produced by implantation of negative muons. It is found that thermal ionization is the main mechanism for ionizing the Al acceptor impurity in both p-type and n-type silicon with an impurity concentration of ≲1015cm−3 at T>45 K. The thermal ionization rate of Al ACs in Si varies from ∼105 to ∼106s−1 in the temperature range 45–55 K.

PACS numbers

71.55.Cn 61.72.Tt 76.75.+i 36.10.Dr 


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Copyright information

© MAIK "Nauka/Interperiodica" 2004

Authors and Affiliations

  • T. N. Mamedov
    • 1
  • D. G. Andrianov
    • 2
  • D. Herlach
    • 3
  • V. N. Gorelkin
    • 4
  • A. V. Stoikov
    • 1
  • U. Zimmermann
    • 3
  1. 1.Joint Institute for Nuclear ResearchDubna, Moscow regionRussia
  2. 2.State Research and Project Institute of Rare-Metal Industry “Giredmet,”MoscowRussia
  3. 3.Paul Scherrer InstitutVilligen PSISwitzerland
  4. 4.Moscow Institute of Physics and TechnologyDolgoprudnyi, Moscow regionRussia

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