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Investigation of the Role of Excited States in the Impurity Breakdown Development
Author(s) -
Danilchenko B. A.,
Komirenko S. I.,
Rozhko S. Kh.
Publication year - 1991
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221650214
Subject(s) - impurity , excited state , condensed matter physics , phonon , materials science , non equilibrium thermodynamics , atomic physics , physics , thermodynamics , quantum mechanics
I–U characteristics of n‐Ge:Sb samples with impurity concentrations of N d = 2 × 10 16 cm −3 are of S ‐shape at the temperature of liquid He. The depth of the NDC‐region increases with lowering the temperature and with application of uniaxial stress along the 〈111〉 direction. This fact is explained within the framework of the “three‐level” mechanism of the impurity breakdown. Nonequilibrium ballistic phonons ionise excited states of impurity atoms abundantly populated in pre‐breakdown fields, and cause the development of breakdown, that approves the model discussed.