Collective impact ionization has been used to explain lock-on in semi-insulating GaAs under high-voltage bias. We have used this theory to study some of the steady state properties of lock-on current filaments. In steady state, the heat gained from the field is exactly compensated by the cooling due to phonon scattering. In the simplest approximation, the carrier distribution approaches a quasi-equilibrium Maxwell-Boltzmann distribution. In this report, we examine the validity of this approximation. We find that this approximation leads to a filament carrier density which is much lower than the high density needed to achieve a quasi-equilibrium distribution. Further work on this subject is in progress.
|Number of pages||4|
|State||Published - 1999|
|Event||12th IEEE International Pulsed Power Conference - Monterey, CA, USA|
Duration: Jun 27 1999 → Jun 30 1999
|Conference||12th IEEE International Pulsed Power Conference|
|City||Monterey, CA, USA|
|Period||06/27/99 → 06/30/99|