Multiphysics simulations of carrier transport and electrodynamics in two-dimensional electron systems

We present a multiphysics numerical technique and use it for simulating carrier dynamics under electromagnetic excitation in supported two-dimensional electronic systems. The technique combines ensemble Monte Carlo (EMC) for carrier transport with finite-difference time-domain (FDTD) for electrodynamics and molecular dynamics (MD) for short-range Coulomb interactions among particles. We explain the important criteria required for coupling the constituent methods and demonstrate the use of this coupled EMC/FDTD/MD technique by calculating the room-temperature dc and ac conductivity of graphene supported on SiO₂.