T3 - Diffusive transport
4 Outubro 2022, 14:00 • Maria Margarida Cruz
Classification of materials into conductors, insulators and semiconductors and relationship with their electronic structure.
Hole definition and its characteristics.
Pure semiconductors and doped semiconductors. The tight binding approach for electronic states in semiconductors.
Transport by electronic states.
Contribution to the transport of a filled band.
Electrical transport in macroscopic materials using semi-classical model. Boltzmann equation. Approximation of relaxation time. Diffusive transport. Transport on a two-dimensional conductor.
Relaxation of confinement in a two-dimensional gas and transition to a three-dimensional gas.
Einstein relations between mobility and diffusion constant.