Dominant Excitonic Superconductivity in a Three-component Hubbard Chain

Abstract

Understanding superconductivity emerging from repulsive fermions remains a major challenge in condensed matter physics. In this paper, we investigate the pairing tendencies in a one-dimensional, three component repulsive Hubbard model, using the density matrix renormalization group method. At half-filling, the system exhibits density wave ground state due to strong Hubbard repulsions. Upon doping, we find that Cooper pairs can emerge, whose fluctuations predominate the long-range physics in the system across a wide parameter range. The effective attractions between Cooper pairs are mediated by the particle-hole fluctuations in the third non-pairing component, resembling an excitonic mechanism of superconductivity. The coexistence of multiple density waves and superconductivity at different fermion fillings is explored. We also present an analytical study of the pairing mechanism in both weak and strong coupling limits. Our results provide a new perspective for understanding and exploring unconventional superconductivities in strongly correlated fermionic systems.

References in corpus (39)

• The density-matrix renormalization group
• The Hubbard Model
• Absence of superconductivity in the pure two-dimensional Hubbard model
• Ultracold fermions and the SU(N) Hubbard model
• Superconductivity in the repulsive Hubbard model: an asymptotically exact weak-coupling solution
• Systematic study of d-wave superconductivity in the 2D repulsive Hubbard model
• Tensor network states and geometry
• Strongly Correlated Superconductivity
• Mott Insulators of Ultracold Fermionic Alkaline Earth Atoms: Underconstrained Magnetism and Chiral Spin Liquid
• Superconductivity in the Hubbard model and its interplay with charge stripes and next-nearest hopping t'
• Modeling the Unconventional Superconducting Properties of Expanded A${}_3$C${}_{60}$ Fullerides
• Friedel Oscillations and Charge Density Waves in Chains and Ladders
• d-wave Superconductivity in the Hubbard Model
• Phase diagram of the half-filled two-dimensional SU(N) Hubbard-Heisenberg model: a quantum Monte Carlo study
• Ground State Phase Diagram of the $t$-$t^{\prime }$-$J$ model
• Ground state phase diagram of the doped Hubbard model on the 4-leg cylinder
• Phases of one-dimensional SU(N) cold atomic Fermi gases --from molecular Luttinger liquids to topological phases
• Unified understanding of superconductivity and Mott transition in alkali-doped fullerides from first principles
• Pseudogap and Fermi surface topology in the two-dimensional Hubbard model
• Mechanism of High Temperature Superconductivity in a striped Hubbard Model
• Metal-insulator transition in the one-dimensional SU(N) Hubbard model
• Pairing and Superconductivity from weak to strong coupling in the Attractive Hubbard model
• Robust d-wave superconductivity in the square-lattice $t$-$J$ model
• Superconductivity in the doped $t$-$J$ model: results for four-leg cylinders
• Tensor Network Python (TeNPy) version 1
• Enhancing superconductivity in A3C60 fullerides
• Emergent Superconductivity and Competing Charge Orders in Hole-Doped Square-Lattice $t$-$J$ Model
• Mechanism of Superconductivity in the Hubbard Model at Intermediate Interaction Strength
• Spin-triplet superconductivity from interband effect in doped insulators
• Magnetic ordering of three-component ultracold fermionic mixtures in optical lattices
• Mott Transitions of Three-Component Fermionic Atoms with Repulsive Interaction in Optical Lattices
• Ground-state phase diagram of the extended two-leg $t$-$J$ ladder
• Metal-insulator transition and quantum magnetism in the SU(3) Fermi-Hubbard Model: Disentangling Nesting and the Mott Transition
• Finite Temperature Phase Transitions in the SU$(N)$ Hubbard model
• Revisiting superconductivity in the extended one-band Hubbard model: pairing via spin and charge fluctuations
• Exciton dynamics uncovering electron fractionalization in superconducting cuprates
• Competing Charge and Magnetic Order in Fermionic Multi-Component Systems
• Dominant Superconducting Fluctuations in the One-Dimensional Extended Holstein-Extended Hubbard model
• Noncentrosymmetric superconductors in one dimension