Speaker
Giorgio Sangiovanni
(Uni Würzburg - Institut für Theoretische Physik und Astrophysik)
Description
In the recent literature, the concept of topological Mott insulator has been spelled out in quite different ways. Most of the proposed realizations rely either on Hartree-Fock approximations or on appropriately defined auxiliary degrees of freedom. I will discuss a novel, remarkably simple way of describing a topological Mott insulator without long-range order based on the topological properties of their Green’s function zeros in momentum space. After discussing the fate of the bulk-boundary correspondence in these systems, I will show how the zeros can be seen as a form of "topological antimatter” with distinctive features associated to the annihilation with conventional topologically protected edge modes.
Primary author
Giorgio Sangiovanni
(Uni Würzburg - Institut für Theoretische Physik und Astrophysik)
