In this poster, we will present a free and open-source Monte Carlo simulator FreePATHS for multi-processed simulations of phonon and electron transport in complex three-dimensional geometries. Using FreePATHS, we simulate various micro-systems, such as nanowires, membranes, and phononic crystals, and demonstrate various nanoscale effects. For instance, we show the ballistic thermal phonon transport occurs at the nanoscale and   impacts the heat conduction in nanowires and nanowire networks. We also demonstrate how pores in silicon membrane affect both phonon and electron transport and thus shape the performance of a thermoelectric device. This project offers a free and reliable tool for nanoscale simulations of thermal electric properties in semiconductor devices.
Acknowledgments:
This work has been partially funded by the CNRS Energy unit (Cellule Energie) through the project SEGMENT.