"Engineering Electronic Properties and Phases in Complex Quantum Materials”

21.11.2022 14:00 – 16:00

Complex quantum materials, systems effectively described by multiple internal degrees of freedom (DOF), allow for novel electronic properties and phases of matter. The most fundamental DOF in solid state physics is the electronic spin, as the intrinsic angular momentum of the electrons. Once electrons are within atoms, and atoms within crystalline structures, we can also talk about multiple other degrees of freedom such as orbital and sublattice. In this talk, I give two examples of how complexity allows for novel electronic properties and phases. First, I highlight how the enlargement of the order parameter space in multi-DOF superconductors gives us specific pathways to generate odd-parity (potentially topological) superconductivity. Here I use as example the recently reported heavy fermion superconductor CeRh2As2. Second, I discuss a purely electrostatic protocol for the generation of artificial gauge fields in twisted bilayer graphene, which is experimentally more appealing than the standard protocols based on the application of strain. I conclude connecting these works to the main research lines in my group and giving you some perspective on our current projects and future plans.

Lieu

Bâtiment: Ecole de Physique

Auditoire Stückelberg,

entrée libre