Pairing Tendencies in a Two-orbital Hubbard Model in One Dimension

Abstract

The recent discovery of superconductivity under high pressure in the ladder compound BaFe${}_2$S${}_3$ has opened a new field of research in iron-based superconductors with focus on quasi one-dimensional geometries. In this publication, using the Density Matrix Renormalization Group technique, we study a two-orbital Hubbard model defined in one dimensional chains. Our main result is the presence of hole binding tendencies at intermediate Hubbard $U$ repulsion and robust Hund coupling $J_H/U=0.25$. Binding does not occur neither in weak coupling nor at very strong coupling. The pair-pair correlations that are dominant near half-filling, or of similar strength as the charge and spin correlation channels, involve hole-pair operators that are spin singlets, use nearest-neighbor sites, and employ different orbitals for each hole. The Hund coupling strength, presence of robust magnetic moments, and antiferromagnetic correlations among them are important for the binding tendencies found here.

References in corpus (44)

• The density-matrix renormalization group
• Correlated Electrons in High Temperature Superconductors
• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• Surprises on the Way from 1D to 2D Quantum Magnets: the Novel Ladder Materials
• Superconductivity in Iron Compounds
• A Common Thread: the pairing interaction for the unconventional superconductors
• Gap symmetry and structure of Fe-based superconductors
• Theory of Intertwined Orders in High Temperature Superconductors
• Electronic Origin of High Temperature Superconductivity in Single-Layer FeSe Superconductor
• Magnetism and its microscopic origin in iron-based high-temperature superconductors
• Experiments on Ladders Reveal a Complex Interplay between a Spin-Gapped Normal State and Superconductivity
• The Unexpected Properties of Alkali Metal Iron Selenide Superconductors
• Pressure-induced Superconductivity in the Iron-based Ladder Material BaFe2S3
• Hole and Pair Structures in the t-J model
• Iron Displacements and Magnetoelastic Coupling in the Spin-Ladder Compound BaFe2Se3
• Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy
• Evidence for Strong Itinerant Spin Fluctuations in the Normal State of CeFeAsO(0.89)F(0.11) Iron-Oxypnictides
• Orbital Selective Magnetism in the Spin-Ladder Iron Selenides Ba${}_{1-x}$K${}_x$Fe${}_2$Se${}_3$
• Pair Density Wave correlations in the Kondo-Heisenberg Model
• Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe2Se3
• Ferromagnetism in Electronic Models for Manganites
• Anisotropy in BaFe2Se3 single crystals with double chains of FeSe tetrahedra
• BaFe${}_2$Se${}_3$: a high $T_{\mathrm{C}}$ magnetic multiferroic with large ferrielectric polarization
• Pair Correlations in Doped Hubbard Ladders
• Magnetic States of the Two-Leg Ladder Alkali Metal Iron Selenides $A$Fe${}_2$Se${}_3$
• Doped Stripes in Models for the Cuprates Emerging from the One-hole Properties of the Insulator
• Spin Glass and Semiconducting Behavior in 1D BaFe2-δSe3 Crystals
• Pressure-driven phase transition from antiferromagnetic semiconductor to nonmagnetic metal in two-leg ladders $A$Fe${}_2$$X$${}_3$ ($A$=Ba or K, $X$=S or Se)
• Magnetic properties and pairing tendencies of the iron-based superconducting ladder BaFe${}_2$S${}_3$: combined ab initio and density matrix renormalization group study
• Ab initio downfolding study of the iron-based ladder superconductor BaFe${}_2$S${}_3$
• First-principles study of magnetic properties in Fe-ladder compound BaFe2S3
• Hole redistribution in Sr\_(14-x)Ca\_xCu\_24O\_41 (x = 0, 12) spin ladder compounds: ^63Cu and ^17O NMR study under pressure
• Even-parity spin-triplet pairing for orbitally degenerate correlated electrons by purely repulsive interactions
• Indications of Spin-Charge Separation at Short Distance and Stripe Formation in the Extended t-J Model on Ladders and Planes
• Robust d-wave Pairing Correlations in the Heisenberg Kondo Lattice Model
• Magnetic Phase Diagram of a Five-Orbital Hubbard Model in the Real-Space Hartree Fock Approximation Varying the Electronic Density
• Magnetic states of the five-orbital Hubbard model for one-dimensional iron-based superconductors
• Stripes in the Ising Limit of Models for the Cuprates
• $B_{1g}$-like pairing states in two-leg ladder iron superconductors
• Doped two orbital chains with strong Hund's rule couplings - ferromagnetism, spin gap, singlet and triplet pairings
• Pair Density Waves in coupled doped two-leg Ladders
• Superconductivity in a Two-Orbital Hubbard Model with Electron and Hole Fermi Pockets: Application in Iron Oxypnictide Superconductors
• Superconductivity in a model of two Hubbard chains coupled with ferromagnetic exchange interaction
• Coexistence of Pairing Tendencies and Ferromagnetism in a Doped Two-Orbital Hubbard Model on Two-Leg Ladders

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• Sequential structural and antiferromagnetic transitions in BaFe${}_2$Se${}_3$ under pressure
• Electronic structure, magnetic correlations, and superconducting pairing in the reduced Ruddlesden-Popper bilayer La${}_3$Ni${}_2$O${}_6$ under pressure: different role of $d_{3z^2-r^2}$ orbital compared with La${}_3$Ni${}_2$O${}_7$
• Fingerprints of an Exotic Orbital-Selective Mott Phase in the Block Magnetic State of BaFe${}_2$Se${}_3$ Ladders
• Pairing versus phase coherence of doped holes in distinct quantum spin backgrounds
• Iron telluride ladder compounds: Predicting the structural and magnetic properties of BaFe${}_2$Te${}_3$
• Interaction-induced topological phase transition and Majorana edge states in low-dimensional orbital-selective Mott insulators
• Gradual Enhancement of Stripe-Type Antiferromagnetism in Spin Ladder Material BaFe${}_2$S${}_3$ Under Pressure
• Pair-density-wave superconductor from doping Haldane chain and rung-singlet ladder
• Magnetic states of iron-based two-leg ladder tellurides
• Emergence of Superconductivity in Doped Multiorbital Hubbard Chains
• Two-hole ground state wavefunction: Non-BCS pairing in a $t$-$J$ two-leg ladder system
• Prediction of exotic magnetic states in the alkali metal quasi-one-dimensional iron selenide compound Na${}_2$FeSe${}_2$
• Range of biquadratic and triquadratic Heisenberg effective couplings deduced from multiorbital Hubbard models
• Spectroscopic signatures of next-nearest-neighbor hopping in the charge and spin dynamics of doped one-dimensional antiferromagnets
• Quantum magnetism of iron-based ladders: Blocks, spirals, and spin flux
• Renormalization group analysis for the quasi-1D superconductor BaFe${}_2$S${}_3$
• Intertwined charge, spin, and pairing orders in doped iron ladders
• Excitonic density-waves, bi-excitons and orbital selective pairing in two-orbital correlated chains
• Topological and magnetic properties of the interacting Bernevig-Hughes-Zhang model
• Luther-Emery liquid and dominant singlet superconductivity in the hole-doped Haldane spin-1 chain
• Coupled Hubbard ladders at weak coupling: Pairing and spin excitations
• Evidence for valence-bond pairing in a one-dimensional two-orbital system
• Intertwined charge, spin, and orbital degrees of freedom under electronic correlations in the one-dimensional Fe${}^{3+}$ chalcogenide chain
• Quasi-one-dimensional spin excitations in the iron pnictide NaFe${}_{0.53}$Cu${}_{0.47}$As