Title: Modeling novel thermal transport phenomena in semiconductor nanowires.
Speaker: Subash Gireesan (CCER)
Time: March 11, 2021, 10:00–11:00
Location: Online (MS Teams)
Abstract: Transport of heat, i.e. thermal energy, plays an important role in our daily lives. Ranging from regulating the temperature of our body to cooling down our electronic devices, the importance of heat transport is not often valued as we go about with our lives. Efficient management of heat is crucial in designing devices like internal combustion engines, electronics, space crafts, solar collectors, gas turbines and radiators. In some applications, excess heat has to be removed and in others, it has to be added. The challenge for the engineers and scientists is to design systems in such a way that the usage or dissipation of heat can be optimized. In the last few decades, manipulating and controlling thermal transport at the nanoscale has garnered wide interest. This is mainly motivated by the need for understanding and improving the efficiency of systems and devices for various technological applications like thermal management of microelectronics, thermoelectric energy conversion, thermal energy storage and thermal rectification. Probing thermal transport in nanoscale materials like semiconductor nanowires has revealed novel transport behavior like room-temperature ballistic transport of phonons. For a better understanding of the origin of novel thermal transport phenomena in nanomaterials, new models and theories are required. In this talk, I will present some of the main results from our work on modeling thermal transport in semiconductor nanowires. I will briefly talk about the models that we developed to better understand novel results from thermal transport measurements on GaP nanowires.