DENE · Dynamical effects on neutral excitations

Dynamical effects on neutral excitations

One of the main objectives of today’s ongoing research is the design of new materials with specific properties for technological applications. A successful material modeling requires the microscopic understanding of the elementary excitations induced by external perturbations (e.g. light, electronic currents, etc.). The aim of DENE is the development of a theoretical tool in the framework of many body perturbation theory (MBPT) for the description of neutral excitations that are directly probed in absorption, electron energy loss and inelastic X-Ray scattering experiments. It is focused on the description of dynamical effects beyond the quasi particle picture that are not taken into account in the present theories with application to challenging problems namely: (i) the correct description of the spectrum in systems where dynamical effects are not negligible as metals and strongly correlated insulators, (ii) the description of multiple excitations that are not included in a quasi particle picture, (iii) the understanding of the role played by electronic correlations on the lifetime of neutral excitations.

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