Calculation of the Electron Velocity Distribution in High Electron Mobility Transistors Using an Ensemble Monte Carlo Method

摘要

The electron velocity distribution is calculated for an idealized model of the high electron mobility transistor using a many-particle Monte Carlo model and a self-consistent two-dimensional Poisson solver. Hot electron effects, nonstationary effects, and real space transfers are analyzed. The results show that significant velocity overshoot 2.8 X 10 to the 7th power cm/s at 300 K and 3.7 X 10 to the 7th power cm/s at 77 K exists under the gate and that the velocity overshoot is limited by both k-space transfer and real-space transfer. The values of the overshoot velocities are much smaller than those obtained from the more conventional drift-diffusion model.