“Interacting topological quantum chemistry of Mott atomic limits” by Martina Ondina Soldini
Автор: Virtual Science Forum
Загружено: 2023-01-31
Просмотров: 536
https://arxiv.org/abs/2209.10556
Authors: Martina O. Soldini, Nikita Astrakhantsev, Mikel Iraola, Apoorv Tiwari, Mark H. Fischer, Roser Valentí, Maia G. Vergniory, Glenn Wagner, Titus Neupert
Topological quantum chemistry (TQC) is a successful framework for identifying (non-interacting) topological materials. Based on the symmetry eigenvalues of Bloch eigenstates at high symmetry momenta, which are attainable from first principles calculations, a band structure can either be classified as an atomic limit, in other words adiabatically connected to independent electronic orbitals on the respective crystal lattice, or it is topological. For interacting systems, there is no single-particle band structure and hence, the TQC machinery grinds to a halt. We develop a framework analogous to TQC, but employing n-particle Green's function to classify interacting systems. Fundamentally, we define a class of interacting reference states that generalize the notion of atomic limits, which we call M
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