Efficient Two-Center Auger Mechanism of Electron Trapping by Fe^{3+} Ions in ZnSe:Fe,Cr

• Authors: M. Surma , M. Godlewski
• Languages of publication: EN

Abstracts

EN

A detailed analysis of decay kinetics of light induced electron spin resonance signals of Cr^{1+} and Fe^{3+} ions in ZnSe:Fe,Cr is given. We observe that the Cr^{1+} electron spin resonance signal decays once free electrons are thermally ionized from shallow donors of ZnSe. Such unusual behavior of the Cr^{1+} electron spin resonance signal is explained by efficient two-center Auger recombination: the Cr^{1+} center is ionized due to the Auger-type energy transfer from the electron being trapped by the Fe^{3+} ion. Such process is shown to be consistent with the temperature dependence of the decay times of electron spin resonance signals. Its quantum efficiency is estimated to be as large as 18% for Cr and Fe concentrations which were studied.

Keywords

EN

76.30.He; 71.55.Gs; 78.55.Et

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1997
• Volume: 92
• Issue: 5
• Pages: 1017-1020

Dates

published

1997-11

Contributors

author

M. Surma

• Institute of Physics, Polish Academy Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland

author

M. Godlewski

• Institute of Physics, Polish Academy Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland