Pairing from strong repulsion in triangular lattice Hubbard model

Abstract

We propose a paring mechanism between holes in the dilute limit of doped frustrated Mott insulators. Hole pairing arises from a hole-hole-magnon three-body bound state. This pairing mechanism has its roots on single-hole kinetic energy frustration, which favors antiferromagnetic (AFM) correlations around the hole. We demonstrate that the AFM polaron (hole-magnon bound state) produced by a single-hole propagating on a field-induced polarized background is strong enough to bind a a second hole. The effective interaction between these three-body bound states is repulsive, implying that this pairing mechanism is relevant for superconductivity.

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Cited by in corpus (22)

• Magnetically mediated hole pairing in fermionic ladders of ultracold atoms
• Site-resolved imaging of ultracold fermions in a triangular-lattice quantum gas microscope
• Observation of Nagaoka Polarons in a Fermi-Hubbard Quantum Simulator
• Directly imaging spin polarons in a kinetically frustrated Hubbard system
• Itinerant spin polaron and metallic ferromagnetism in semiconductor moiré superlattices
• Tunable spin and valley excitations of correlated insulators in $\Gamma$-valley moiré bands
• Hofstadter states and reentrant charge order in a semiconductor moiré lattice
• Quantum gas microscopy of a geometrically frustrated Hubbard system
• Polaronic mechanism of Nagaoka ferromagnetism in Hubbard models
• Pseudogap metal and magnetization plateau from doping moiré Mott insulator
• Spin-polarons and ferromagnetism in doped dilute Wigner-Mott insulators
• A resonant valence bond spin liquid in the dilute limit of doped frustrated Mott insulators
• Magnonic Superconductivity
• Instability of Nagaoka State and Quantum Phase Transition via Kinetic Frustration Control
• Exploring kinetically induced bound states in triangular lattices with ultracold atoms: spectroscopic approach
• Shaping Magnetic Order by Local Frustration for Itinerant Fermions on a Graph
• Three-electron bunches in occupation of a 5-site Coulomb cluster
• Doping-induced Quantum Anomalous Hall Crystals and Topological Domain Walls
• Itinerant magnetism in Hubbard models with long-range interactions
• Odd-frequency superfluidity from a particle-number-conserving perspective
• Spin-spiral instability of the Nagaoka ferromagnet in the crossover between square and triangular lattices
• Site-resolved observables in the doped spin-imbalanced triangular Hubbard model