Hydrodynamical study of terahertz emission in magnetized graphene field-effect transistors

Several hydrodynamic descriptions of charge transport in graphene have been presented recent years. We discuss a general model governing the dynamics two-dimensional electron gas magnetized field-effect transistor slow drift regime. The Dyakonov–Shur instability is investigated, including effect weak magnetic fields (i.e., away from Landau levels). verify that occurrence gap on dispersion relation imposes limit Mach number electronic flow, as it does not allow unstable frequencies to be below ωc. Furthermore, we presence external field decreases growth rate instability, well saturation amplitude. numerical results our simulations and higher order dynamic mode decomposition support such reasoning.