Título: "Electronic and optical properties of semiconducting materials: A first-principles approach"
Abstract: "The study of crystalline semiconductors remains a cornerstone of modern materials science, driven by the demand for novel optoelectronic devices and emerging quantum technologies. To model these materials accurately, researchers rely on ab initio (first-principles) calculations. By solving the Many-Body Schrödinger equation using only fundamental physical constants and atomic structures (without empirical fitting parameters) this approach provides a predictive, unbiased description of material properties that can be directly validated by experiments.
In this seminar, I will provide a pedagogical overview of the state-of-the-art theoretical frameworks used to determine the electronic and optical properties of semiconductors. We will discuss the transition from ground-state properties via Density Functional Theory (DFT) to quasiparticle excitations using the GW approximation, and finally, the description of excitonic effects through the Bethe-Salpeter Equation (BSE). Furthermore, we will touch upon non-equilibrium optical properties by exploring the equation of motion for the density matrix. By bridging theoretical foundations with real-world results, this seminar aims to demonstrate the powerful capability of first-principles methods to predict the behavior of semiconducting materials."
Jose Luis Rodrigo Ramon Benedito Donizeti Botan Neto