Fractional power-law behavior and its origin in iron-chalcogenide and ruthenate superconductors: Insights from first-principles calculations

Abstract

We perform realistic first-principles calculations of iron chalcogenides and ruthenate based materials to identify experimental signatures of Hund's coupling induced correlations in these systems. We find that FeTe and K${}_x$Fe${}_{2-y}$Se${}_2$ display unusual orbital dependent fractional powerlaw behavior in their quasiparticle self energy and optical conductivity, a phenomena first identified in SrRuO${}_3$. Strong incoherence in the paramagnetic state of these materials results in electronic states hidden to angle-resolved photoemission spectroscopy which reemerge at low temperatures. We identify the effective low energy Hamiltonian describing these systems and show that these anomalies are not controlled by the proximity to a quantum critical point but result from coexistence of fast quantum mechanical orbital fluctuations and slow spin fluctuations.

Phys. Rev. B 86, 195141 (2012), two typos corrected

References in corpus (13)

• Electrodynamics of Correlated Electron Materials
• Quantum Monte Carlo Impurity Solver for Cluster DMFT and Electronic Structure Calculations in Adjustable Base
• Correlated electronic structure of LaOFeAs
• Coherence-incoherence crossover in the normal state of iron-oxypnictides and importance of the Hund's rule coupling
• Magnetism and Charge Dynamics in Iron Pnictides
• Spin freezing transition and non-Fermi-liquid self-energy in a 3-orbital model
• The coherence-incoherence crossover and the mass-renormalization puzzles in Sr2RuO4
• Theoretical evidence for strong correlations and incoherent metallic state in FeSe
• Unified Picture for Magnetic Correlations in Iron-Based Superconductors
• Dichotomy between large local and small ordered magnetic moment in Iron-based superconductors
• Kondo resonance narrowing in d- and f-electron systems
• Neutron scattering Measurements of the phonon density of states of FeSe${}_{1-x}$ superconductors
• Magnetic softness in iron-based superconductors

Cited by in corpus (47)

• Emergence of the nematic electronic state in FeSe
• Ironing out the details of unconventional superconductivity
• Orbital-selective Mott Phase in Multiorbital Models for Alkaline Iron Selenides K(1-x)Fe(2-y)Se2
• Quenched pair breaking by interlayer correlations as a key to superconductivity in La${}_3$Ni${}_2$O${}_7$
• Non-Thermal Emergence of an Orbital-Selective Mott Phase in FeTe${}_{1-x}$Se${}_x$
• Correlation-Driven Electronic Reconstruction in FeTe${}_{1-x}$Se${}_x$
• Shining light on transition metal oxides: unveiling the hidden Fermi Liquid
• Non-Fermi Liquid and Hund Correlation in La${}_4$Ni${}_3$O${}_{10}$ under High Pressure
• Orbital-selective Mott phase in multiorbital models for iron pnictides and chalcogenides
• Orbital-differentiated coherence-incoherence crossover identified by photoemission spectroscopy in LiFeAs
• Is the orbital-selective Mott phase stable against interorbital hopping?
• Electronic correlations in the van der Waals ferromagnet Fe${}_3$GeTe${}_2$ revealed by its charge dynamics
• $\mathrm{F}{\mathrm{e}}_3\mathrm{GeT}{\mathrm{e}}_2$: A site-differentiated Hund metal
• Quantum phase transition between orbital-selective Mott states in Hund's metals
• Differentiating Hund from Mott physics in a three-band Hubbard-Hund model: Temperature dependence of spectral, transport, and thermodynamic properties
• Correlation-corrected band topology and topological surface states in iron-based superconductors
• La${}_2$O${}_3$Fe${}_2$Se${}_2$, a Mott insulator on the brink of orbital-selective metalization
• Incoherent-coherent crossover and the pseudogap in Te-annealed superconducting Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$ revealed by magnetotransport measurements
• Analytical slave-spin mean-field approach to orbital selective Mott insulators
• Heavy Electron doping-induced antiferromagnetic phase as the parent for iron-oxypnictide superconductor LaFeAsO1-xHx
• Orbital Selective Mott Transition Effects and Non-Trivial Topology of Iron Chalcogenide
• Kondo interaction in FeTe and its potential role in the magnetic order
• Correlation Driven Phonon Anomalies in Bulk FeSe
• Orbital-selective spin waves in detwinned NaFeAs
• Spin-orbit coupling in three-orbital Kanamori impurity model and its relevance for transition-metal oxides
• Cation Order Control of Correlations in Double Perovskite Sr${}_2$VNbO${}_6$
• High pressure growth and electron transport properties of superconducting SmFeAsO1-xHx single crystals
• Emergent moments in a Hund's impurity
• Observation of an Emergent Coherent State in the Iron-Based Superconductor KFe${}_2$As${}_2$
• Persistent flat band splitting and strong selective band renormalization in a kagome magnet thin film
• Switching between Mott-Hubbard and Hund physics in moiré quantum simulators
• Breakdown of single spin-fluid model in heavily hole-doped superconductor CsFe2As2
• Temperature dependence of correlated electronic states in archetypal kagome metal CoSn
• Orbital-selective coherence-incoherence crossover and metal-insulator transition in Cu-doped NaFeAs
• Fermi surface, pressure-induced antiferromagnetic order, and superconductivity in FeSe
• Low-energy perspective on two-orbital Hund metals and the case of LaNiO2
• Signatures of Hund Metal and finite-frequency nesting in Sr${}_2$RuO${}_4$ Revealed by Electronic Raman Scattering
• Emergent spin-glass state in the doped Hund's metal CsFe2As2
• Novel $J_{\mathrm{eff}}$=3/2 Metallic Phase and Unconventional Superconductivity in GaTa${}_4$Se${}_8$
• Frozen spin ratio and the detection of Hund correlations
• Interplay of charge and spin fluctuations in a Hund's coupled impurity
• Electronic structure and magnetism of the Hund insulator CrI3
• Electronic Correlations and Absence of Superconductivity in the Collapsed Phase of LaFe${}_2$As${}_2$
• Hole doping and electronic correlations in Cr-substituted BaFe${}_2$As${}_2$
• Triplet pairing, orbital selectivity and correlations in Iron-based superconductors
• Electronic phase diagram in Te-annealed superconducting FeTe${}_{1-x}$Se${}_x$ revealed by magnetic susceptibility
• On the bad metallicity and phase diagrams of Fe${}_{1+\delta }X$ ($X$ =Te, Se, S, solid solutions): an electrical resistivity study