TITLE

Electric-field-enhanced electron capture coefficient of EL2 level in semi-insulating GaAs

AUTHOR(S)
Kiyama, M.; Tatsumi, M.; Yamada, M.
PUB. DATE
January 2005
SOURCE
Applied Physics Letters;1/3/2005, Vol. 86 Issue 1, p012102
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The electric-field dependence of electron capture coefficient to EL2 donor level in semi-insulating GaAs has been quantitatively determined from the analysis of the sublinear J–E characteristics up to 1150 V/cm before the onset of the low-frequency current oscillation. The three-probe guard-ring method was employed to obtain precise J–E characteristics. By considering the rate equation of the capture and emission process in the steady state, a simplified formula was derived to determine the electric-field dependence of capture coefficient. Our results agree well with those calculated from the multiphonon emission capture model.
ACCESSION #
15593193

 

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