On dissociation in weakly doped ice

Currently, there is some ambiguity in the problem of decay of a single donor into charged fragments. Thus, in the well-known Ostwald approximation used for semiconductors (ice being one of them) the donor dissociation degree of tends to its maximum value (i.e., unity) as the doping impurity concentr...

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Bibliographic Details
Published in:Low temperature physics (Woodbury, N.Y.) N.Y.), 2015-06, Vol.41 (6), p.465-468
Main Authors: Chikina, I., Shikin, V.
Format: Article
Language:English
Subjects:
Approximation
Mathematical analysis
Nuclei (nuclear physics)
Ostwald ripening
Thermodynamic equilibrium
Unity
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Summary:Currently, there is some ambiguity in the problem of decay of a single donor into charged fragments. Thus, in the well-known Ostwald approximation used for semiconductors (ice being one of them) the donor dissociation degree of tends to its maximum value (i.e., unity) as the doping impurity concentration approaches zero. At the same time, the statistical theory of atom reveals within the Thomas–Fermi (or Debye–Hückel) approximation the existence of a thermodynamically equilibrium state of a single multi-electron atom (donor) where charged nucleus keeps the number of counterions just necessary for its neutralization. These scenarios do not show the atom dissociation at all. Discussed in the present paper is the alternative between the full dissociation of a single donor (i.e., dissociation degree equals unity) in a semiconducting media (ice, water, semiconductor) and zero dissociation degree.
ISSN:1063-777X
1090-6517
DOI:10.1063/1.4922100