Simulation of drift-diffusion transport of charge carriers in semiconductor layers with a fractal structure in an alternating electric field

Based on the fractional-order partial differential equation, the diffusion-drift charge-carrier transport in a semiconductor layer with a fractal structure under a longitudinal alternating electric field is simulated. The simulation showed that the space–time distributions of carriers are broadened and asymmetric in layers with a fractal structure. Under certain conditions, the effect of charge oscillation frequency doubling in an external alternating electric field is observed.