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Electronic properties of isolated GaNAsM clusters: photoionization-, photodissociation- and photoluminescence quantum yields

  • Rolf Schäfer
  • Jörg A. Becker
Article

Abstract

Photoionization quantum yields of GaNAsM clusters with N + M = 85 ± 5 atoms in the spectral range of ω = 3.5–6.4 eV have been investigated by measuring their total photoabsorption and photoionization cross sections. It is found that the photoionization quantum yields of these clusters are strongly increased by about two orders of magnitude against the values of bulk GaAs. Photodissociation of the cluster provides another efficient channel whereas photoluminescence plays a minor role for the observed cluster size distributions with N + M typically between 30 and 130 atoms.

PACS

36.40 

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References

  1. 1.
    Weller, H.: Adv. Mater. 5, 88 (1993)ADSCrossRefGoogle Scholar
  2. 2.
    de Heer, W.A.: Rev. Mod. Phys. 65, 611 (1993)ADSCrossRefGoogle Scholar
  3. 3.
    Rinnen, K.-D., Mandich, M.L.: Phys. Rev. Lett. 69, 1823 (1992); Rinnen, K.D. et al.: J. Chem Phys. 96, 4088 (1992)ADSCrossRefGoogle Scholar
  4. 4.
    O’Brien, S.C. et al.: J. Chem. Phys. 84, 4074 (1986); Fuke, K. et al.: J. Chem. Phys. 99, 7807 (1993)ADSCrossRefGoogle Scholar
  5. 5.
    Uchida, H. et al.: J. Phys. Chem. 96, 1156 (1992)CrossRefGoogle Scholar
  6. 6.
    Frenzel, U. et al.: Chem. Phys. Lett. 240, 109 (1995)ADSCrossRefGoogle Scholar
  7. 7.
    Rohlfing, E.A.: J. Chem. Phys. 89, 6103 (1988)ADSCrossRefGoogle Scholar
  8. 8.
    Frenzel, U. et al.: Surf. Rev. Lett. (in press)Google Scholar
  9. 9.
    Schäfer, R. et al.: Z. Naturforsch. 50a, 445 (1995); Woenckhaus, J., Becker, J.A.: Rev. Sci. Instrum. 65, 2019 (1994)ADSGoogle Scholar
  10. 10.
    Gobeli, G.W., Allen, F.G.: Phys. Rev. 137, A245 (1965)ADSCrossRefGoogle Scholar
  11. 11.
    Cohen, M.L., Phillips, J.C.: Phys. Rev. 139, A912 (1965)ADSCrossRefGoogle Scholar
  12. 12.
    The influence of the nozzle temperature on the electronic properties has been already demonstrated by measurements of the static polarizabilities of GaNAsM- and GeNTeM-clusters: Schäfer, R. et al.: Phys. Rev. Lett. 76, 471 (1996)ADSCrossRefGoogle Scholar
  13. 13.
    Hines, M.A., Guyot-Sionnest, P.: J. Phys. Chem. 100, 468 (1996)CrossRefGoogle Scholar
  14. 14.
    Brus, L.: J. Phys. Chem. 90, 2555 (1986)CrossRefGoogle Scholar
  15. 15.
    Weller, H.: private communication, Marburg 1993Google Scholar
  16. 16.
    Delerue, C. et al.: Phys. Rev. B 48, 11024 (1993)ADSCrossRefGoogle Scholar
  17. 17.
    Sandroff, C.J. et al.: Science 245, 391 (1989)ADSCrossRefGoogle Scholar
  18. 18.
    Rühle, W.: private communication, Marburg 1996Google Scholar

Copyright information

© Springer-Verlag 1997

Authors and Affiliations

  • Rolf Schäfer
    • 1
  • Jörg A. Becker
    • 1
  1. 1.Institut für Physikalische Chemie und Wissenschaftliches Zentrum für MaterialwissenschaftenPhilipps-Universität MarburgMarburgGermany

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