Diffusion Limits in Semiconductor Models

Wednesday, May 17, 2000 - 11:15am - 11:30am
Lind 409
Pierre Degond (Université de Toulouse III (Paul Sabatier))
These lectures consist in an introduction to the microscopic transport processes arising in a semiconductor material and their description by means of the kinetic (Boltzmann) equations. Then a review of the hierarchy of diffusion models that can be deduced from the Boltzmann equation through various scaling limits will be given. These include the so-called `Spherical Harmonics Expansion' (or SHE) model and the related `Energy-Transport' and `Drift-Diffusion' models. Depending on the schedule, recently developped topics like heterojunctions, superlattice modeling or quantum-diffusion or kinetic-diffusion coupling will possibly be outlined.