Correlation-driven chiral superconductivity and chiral spin order in doped kagome lattice

Abstract

We study the electronic instabilities of the Hubbard model in the 1/6 hole-doped Kagome lattice using the variational cluster approach. The 1/6 hole doping is unique in the sense that the Fermi level is at the von Hove singularity and the Fermi surface has a perfect nesting. In this case, a density wave is usually realized. However, we demonstrate here that the chiral $d_{x^2-y^2}+i{d}_{xy}$ superconducting state is most favorable when a small Hubbard interaction U(U<3.0t) is introduced, and a scalar chiral spin order is realized at large U(U>5.0t). Between them, a spin-disordered insulating state is proposed.

5 pages, 4 figures

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Cited by in corpus (176)

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• Topological kagome magnets and superconductors
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• Competing electronic orders on Kagome lattices at van Hove filling
• Superconductivity in the ${\mathbb{Z}}_2$ kagome metal KV${}_3$Sb${}_5$
• Double superconducting dome and triple enhancement of Tc in the kagome superconductor CsV3Sb5 under high pressure
• Three-dimensional charge density wave and robust zero-bias conductance peak inside the superconducting vortex core of a kagome superconductor CsV${}_3$Sb${}_5$
• Chiral flux phase in the Kagome superconductor AV${}_3$Sb${}_5$
• Sublattice Interference in the Kagome Hubbard Model
• Nature of unconventional pairing in the kagome superconductors AV${}_3$Sb${}_5$
• Fermi surface mapping and the nature of charge density wave order in the kagome superconductor CsV${}_3$Sb${}_5$
• Kagome superconductors AV${}_3$Sb${}_5$ (A=K, Rb, Cs)
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• Multiband superconductivity with sign-preserving order parameter in kagome superconductor CsV3Sb5
• Twofold symmetry of $c$-axis resistivity in topological kagome superconductor CsV${}_3$Sb${}_5$ with in-plane rotating magnetic field
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• Quantum states and intertwining phases in kagome materials
• Intrinsic nature of chiral charge order in the kagome superconductor RbV3Sb5
• s-wave superconductivity in kagome metal CsV${}_3$Sb${}_5$ revealed by ${}^{121/123}$Sb NQR and ${}^{51}$V NMR measurements
• AV${}_3$Sb${}_5$ Kagome Superconductors: Progress and Future Directions
• Nodeless superconductivity in the kagome metal CsV${}_3$Sb${}_5$
• Origin of the Charge Density Wave in the Kagome Metal CsV${}_3$Sb${}_5$ as Revealed by Optical Spectroscopy
• Highly-robust reentrant superconductivity in CsV3Sb5 under pressure
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• Nodeless electron pairing in CsV${}_3$Sb${}_5$-derived kagome superconductors
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• Intriguing Low-Temperature Phase in the Antiferromagnetic Kagome Metal FeGe
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• Quantum Phases of Kagome Electron System with Half-Filled Flat Bands
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• Chemical Rules for Stacked Kagome and Honeycomb Topological Semimetals
• Electronic band structures of topological kagome materials
• Local spectroscopic evidence for a nodeless magnetic kagome superconductor CeRu${}_2$
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• Observation of anomalous amplitude modes in the kagome metal CsV${}_3$Sb${}_5$
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• Electronic structure and spin-lattice relaxation in superconducting vortex states on the kagome lattice near van Hove filling
• Existence of Hebel-Slichter peak in unconventional kagome superconductors
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• Electronic orders on the kagome lattice at the lower Van Hove filling
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• Observation of Fermi-surface-dependent anisotropic Cooper pairing in kagome superconductor CsV3Sb5
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• Photoemission Insights to Electronic Orders in Kagome Superconductor AV3Sb5
• Interplay of superconductivity and charge-density-wave order in kagome materials
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• Low-energy effective theory and symmetry classification of flux phases on Kagome lattice
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• Interplay of Charge Density Wave and Magnetism on the Kagomé Lattice
• Inversion and Tunability of Van Hove Singularities in $A$V${}_3$Sb${}_5$ ($A$ = K, Rb, and Cs) kagome metals
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• Magnetoresistance hysteresis in the superconduting state of Kagome CsV${}_3$Sb${}_5$
• Nature of the 1/3 Magnetization Plateau in Spin-1/2 Kagome Antiferromagnets
• Constraints on the orbital flux phase in $A$V${}_3$Sb${}_5$ from polar Kerr effect
• Stacking-Dependent Van Hove Singularity Shifts in Three-Dimensional Charge Density Waves of Kagome Metals AV${}_3$Sb${}_5$ (A = K, Rb, Cs)
• Matrix element interference in $N$-patch functional renormalization group
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• Comment on "Unconventional Fermi Surface Instabilities in the Kagome Hubbard Model" by M. Kiesel, C. Platt, and R. Thomale, Phys. Rev. Lett. {\bf 110}, 126405 (2013)
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• Topological Aspects of Dirac Fermions in a Kagomé Lattice
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• de Haas-van Alphen effect of correlated Dirac states in kagome metal Fe3Sn2
• The Role of Hydrogen and Oxygen Interstitial Defects in Crystalline Si cells: Mechanism of Device Degradation in Humid Environment
• Effect of superconductivity by Nb and V substitution in kagome CaPd5
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• Flat Topological Nodal Lines in Heavy-Fermion Compound CeCoGe${}_3$
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