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Nucleation phenomena in electron-hole drop condensation in ultra-pure Ge

  • R. M. Westervelt
  • J. L. Staehli
  • E. E. Haller
  • C. D. Jeffries
Electron-Hole Drops
Part of the Lecture Notes in Physics book series (LNP, volume 57)

Abstract

By careful measurements and appropriate theory, we are able to observe and explain quantitatively for the first time major aspects of electron-hole drop nucleation phenomena in ultra-pure Ge. The free exciton-drop system above 1.3 K is shown to be always in a metastable state, i.e. dependent upon the history o£ optical excitation. We quantitatively explain the observed luminescence hysteresis and measure the drop surface tension, σ = 2.6 × 10−4 erg cm2 at 2 K. The metastability lifetime is experimentally found to be ≈ 8 × 106 sec. The gas-liquid up-going and down-going threshold curves are measured and explained using an exciton condensation energy ø ≅ 2 meV. The theory also predicts the drop radius and drop concentration as a function of temperature and excitation history.

Keywords

Drop Size Free Exciton Nucleation Theory Supersaturation Ratio Drop Radius 
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References

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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • R. M. Westervelt
    • 1
  • J. L. Staehli
    • 1
  • E. E. Haller
    • 1
  • C. D. Jeffries
    • 1
  1. 1.University of CaliforniaBerkeleyUSA

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