Signatures of Hundness in Kagome Metals

Abstract

By means of the density functional theory in combination with the dynamical mean-field theory, we tried to examine the electronic structure of hexagonal FeGe, in which the Fe atoms form a quasi-2D layered Kagome lattice. We predict that it is a representative Kagome metal characterized by orbital selective Dirac fermions and extremely flat bands. Furthermore, Fe's 3$d$ electrons are strongly correlated. They exhibit quite apparent signatures of electronic correlation induced by Hund's rule coupling, such as sizable differentiation in band renormalization, non-Fermi-liquid behavior, spin-freezing state, and spin-orbital separation. Thus, FeGe can be regarded as an ideal platform to study the interplay of Kagome physics and Hundness. 5

arXiv comment5 pages, 3 figures

References in corpus (30)

• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• Continuous-time Monte Carlo methods for quantum impurity models
• Quantum Spin Liquid States
• Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
• Massive Dirac fermions in a ferromagnetic kagome metal
• Strong electronic correlations from Hund's coupling
• Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides
• Antiferromagnetic order and spin dynamics in iron-based superconductors
• Dirac fermions and flat bands in the ideal kagome metal FeSn
• Large intrinsic anomalous Hall effect in half-metallic ferromagnet Co3Sn2S2 with magnetic Weyl fermions
• Evidence for Magnetic Weyl Fermions in a Correlated Metal
• Quantum Monte Carlo Impurity Solver for Cluster DMFT and Electronic Structure Calculations in Adjustable Base
• Dynamical Mean-Field Theory within the Full-Potential Methods: Electronic structure of Ce-115 materials
• Coherence-incoherence crossover in the normal state of iron-oxypnictides and importance of the Hund's rule coupling
• Negative flat band magnetism in a spin-orbit coupled correlated kagome magnet
• Topological flat bands in frustrated kagome lattice CoSn
• Giant and anisotropic many-body spin-orbit tunability in a strongly correlated kagome magnet
• Spin freezing transition and non-Fermi-liquid self-energy in a 3-orbital model
• Exact double-counting in combining the Dynamical Mean Field Theory and the Density Functional Theory
• Orbital-selective Dirac fermions and extremely flat bands in frustrated kagome-lattice metal CoSn
• DMFT+NRG study of spin-orbital separation in a three-band Hund's metal
• Fractional power-law behavior and its origin in iron-chalcogenide and ruthenate superconductors: Insights from first-principles calculations
• Imaging Orbital-selective Quasiparticles in the Hund's Metal State of FeSe
• Hundness versus Mottness in a three-band Hubbard-Hund model: On the origin of strong correlations in Hund metals
• Signatures of Mottness and Hundness in archetypal correlated metals
• Temperature-induced band shift in ferromagnetic Weyl semimetal Co3Sn2S2
• Analytic theory of Hund's metals: a renormalization group perspective
• Spectroscopic determination of the atomic f-electron symmetry underlying hidden order in URu${}_2$Si${}_2$
• Chiral magnetic excitations in FeGe films
• High temperature singlet-based magnetism from Hund's rule correlations

Cited by in corpus (11)

• Discovery of charge density wave in a correlated kagome lattice antiferromagnet
• Intertwined magnetism and charge density wave order in kagome FeGe
• Hund electronic correlation in La${}_3$Ni${}_2$O${}_7$ under high pressure
• Enhanced Spin-polarization via Partial Ge1-dimerization as the Driving Force of the 2$\times$2$\times$2 CDW in FeGe
• Differentiating Hund from Mott physics in a three-band Hubbard-Hund model: Temperature dependence of spectral, transport, and thermodynamic properties
• Observation of Flat Bands and Dirac Cones in a Pyrochlore Lattice Superconductor
• The role of electron correlations in the electronic structure of putative Chern magnet TbMn${}_6$Sn${}_6$
• $\text{Ab initio}$ dynamical mean-field theory with natural orbitals renormalization group impurity solver: Formalism and applications
• Electronic Correlation Effects on Stabilizing a Perfect Kagome Lattice and Ferromagnetic Fluctuation in LaRu${}_3$Si${}_2$
• Frozen spin ratio and the detection of Hund correlations
• Exploring strong electronic correlations in the breathing kagome metal Fe${}_3$Sn