Interacting topological quantum chemistry of Mott atomic limits
Martina O. Soldini, Nikita Astrakhantsev, Mikel Iraola, Apoorv Tiwari, Mark H. Fischer, Roser Valentí, Maia G. Vergniory, Glenn Wagner, Titus Neupert
Abstract
Topological quantum chemistry (TQC) is a successful framework for identifying noninteracting topological materials, based on the symmetry analysis of the Bloch Hamiltonian and on reference states known as atomic limits. However, TQC grinds to a halt once interactions are included. Here, the authors put forward a framework analogous to TQC, but employing $n$-particle Green's function techniques to indicate topology in interacting systems. Fundamentally, they define a class of interacting reference states that generalize the notion of atomic limits, which they call Mott atomic limits. The reference states are symmetry protected topological states.