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Effect of Finite Energy of Deformation Potential Acoustic Phonons on the Low‐Temperature Breakdown Characteristics in n‐Ge
Author(s) -
Pramanik T. K.,
Bhattacharya D. P.
Publication year - 1993
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.2221770218
Subject(s) - phonon , condensed matter physics , kinetic energy , electric field , ionization , electron , impurity , materials science , lattice (music) , thermal , impact ionization , atomic physics , physics , thermodynamics , ion , nuclear physics , quantum mechanics , acoustics
The effect of the finite energy of acoustic phonons on the breakdown characteristics is investigated here for a sample of n‐Ge at lattice temperature 5K. Impact ionization and thermal recombination are the two kinetic processes which need be taken into account for the phenomenon phenomenon of impurity breakdown in n‐Gc. The electric field dependence of impact ionization coefficient A 1 ( E ) and thermal recombination coefficient B 1 ( E ) is investigated here using the newly developed field dependence of electron temperature where the effect of finite energy of the acoustic phonons is taken into account. Then the impurity breakdown characteristics of the material are investigated. The calculations are carried out for a parabolic law of dispersion and a scalar effective mass. In comparison with other calculations and with available experimental data, the results obtained here show a better agreement in some of the characteristics.