Geometric Scattering Describing Mode-Coupling Effects in Non-Uniform Cross-Sections for Non-Equilibrium Green’s Function and Multi Subband Boltzmann Transport Equation Solvers

The non-uniformity of device cross-sections is modeled as a geometric scattering in advanced microscopic transport solvers. With the proposed geometric scattering, the carrier density including the mode-coupling effects can be accurately calculated in the NEGF simulation. The proposed approach allows the MSBTE simulation for MOSFETs with non- uniform cross-sections.