A continuous cellular automaton method with flux interpolation for two-dimensional electron gas electron transport analysis

Due to the innovation of microwave communication using GaN-based HEMT, further improvement of HEMT device performance is expected. Prediction of transport properties of 2D electron gas is indispensable for designing HEMT devices. Since electron energy becomes high in HEMT channel because of its high electric field, a simulation method which covers the effects of band nonparabolicity, subband, and upper valley is required. By combining the Poisson-Schrodinger solver with the continuous cellular automaton method, a new simulation method is realized which stably obtains the electron distribution function over a wide range including the high-energy tail. It is reported that selfconsistent simulation is realized for the case where electron concentration redistribution by intersubband transitions affects subband energies through the Poisson-Schrodinger method.