The physics of excitons in novel 2D materials
Aula 22, ore 11:30
Via Garzetta 48, Brescia
Seminar
The physics of excitons in novel 2D materials
Speaker
Alejandro MOLINA-SÁNCHEZ
Institute of Materials Science, University of Valencia
Abstract
Since the arrival of graphene the collection of 2D materials is increasing every year. 2D semiconducting materials like MoS2 and hexagonal boron nitride were among the first to exhibit novel excitonic properties like very large exciton binding energies as a result of an exceptionally strong Coulomb interaction, properties like the spin and valley polarizations, and interlayer excitons in 2D heterostructures have a large binding energy but longer radiative lifetimes. Moreover, with the arrival of 2D magnetic materials, excitonic properties can be modified by means of magnetic proximity effects. In my talk, I will discuss the physics of excitons in 2D materials from a theoretical perspective and our recent results. Our approach is based in ab initio simulations, within the framework of many-body perturbation theory. I will also introduce an overview of our ongoing research.