The Weyl-Mott point: topological and non-Fermi liquid behavior from an isolated Green's function zero

2024/10/29 by Flores-Calderón, R., Hooley, C. · 3 citations
#FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el)

paper · doi:10.48550/arxiv.2410.22173

Abstract

We present a model in which a Hatsugai-Kohmoto interaction is added to a system of fermions with a Weyl point in their non-interacting dispersion relation, and analyze its behavior as a function of the chemical potential. We show that the model exhibits a Weyl-Mott point -- a single isolated Green's function zero -- and that this implies an emergent non-Fermi-liquid state at the border of the metallic regime and a gapped topological state for the insulating one. The Weyl-Mott point inherits the topological charge from the original Green's function pole, and is therefore naturally associated with a strongly correlated chiral anomaly.

Cited by

• Probing Boundary Spins in the Su-Schrieffer-Heeger-Hubbard model
• Benchmarking Non-perturbative Many-Body Approaches in the Exactly Solvable Hatsugai-Kohmoto Model
• Mott Criticality as the Confinement Transition of a Pseudogap-Mott Metal

Related

• Emergence of Topological Non-Fermi Liquid Phases in a Modified Su-Schrieffer-Heeger Chain with Long-Range Interactions
• Emergent anomaly of Fermi surfaces: a simple derivation from Weyl fermions
• Topological charge excitations and Green's function zeros in paramagnetic Mott insulators
• Dirac zeros in an orbital selective Mott phase: Green's function Berry curvature and flux quantization
• Topologically distinct Weyl-fermion pairs: on the effect of magnetic tunnelling