Triplet pairing, orbital selectivity and correlations in Iron-based superconductors

Abstract

We use a slave-boson approach to study the band renormalization and pair susceptibility in the normal state of Iron-based superconductors in presence of strong Coulomb repulsion and Hund's interaction. Our results show orbital selectivity toward localization of $xy$ orbitals and its interplay with superconductivity. We also compare the recently proposed triplet resonating valence bond theory of superconductivity in Iron-based superconductors with the more conventional $s_{\pm }$ pairing and show that both favor a superconductivity when the $xy$ orbital is delocalized.

References in corpus (24)

• Strong electronic correlations from Hund's coupling
• Near-degeneracy of several pairing channels in multiorbital models for the Fe-pnictides
• Strong Correlations and Magnetic Frustration in the High Tc Iron Pnictides
• Correlated electronic structure of LaOFeAs
• Coherence-incoherence crossover in the normal state of iron-oxypnictides and importance of the Hund's rule coupling
• Spin freezing transition and non-Fermi-liquid self-energy in a 3-orbital model
• Simplified topological invariants for interacting insulators
• Observation of Temperature-Induced Crossover to an Orbital-Selective Mott Phase in A${}_x$Fe${}_{2-y}$Se${}_2$ (A=K, Rb) Superconductors
• Spin-triplet p-wave pairing in a 3-orbital model for iron pnictide superconductors
• Orbital-selective Mott Phase in Multiorbital Models for Alkaline Iron Selenides K(1-x)Fe(2-y)Se2
• Low-energy microscopic models for iron-based superconductors: a review
• Fractional power-law behavior and its origin in iron-chalcogenide and ruthenate superconductors: Insights from first-principles calculations
• Kondo resonance narrowing in d- and f-electron systems
• Topological Phases in the Single-Layer FeSe
• Hund interaction, spin-orbit coupling and the mechanism of superconductivity in strongly hole-doped iron pnictides
• Correlation-Driven Electronic Reconstruction in FeTe${}_{1-x}$Se${}_x$
• Orbital-selective Mott phase in multiorbital models for iron pnictides and chalcogenides
• Quantum critical Eliashberg theory, the SYK superconductor and their holographic duals
• Superconductivity of incoherent electrons in Yukawa-SYK model
• Coexistence of long-range and algebraic correlations for short-range valence-bond wave functions in three dimensions
• Analytical slave-spin mean-field approach to orbital selective Mott insulators
• Pairing enhanced by local orbital fluctuations in a model for monolayer FeSe
• Topological superconductivity from doping a triplet quantum spin liquid in a flat band system
• Interplay of charge and spin fluctuations in a Hund's coupled impurity

Cited by in corpus (1)

• A Landau Theory for Pair Density Modulation in Fe(Te,Se) flakes