Strong pairing in mixed dimensional bilayer antiferromagnetic Mott insulators

Abstract

Interacting many-body systems combining confined and extended dimensions, such as ladders and few layer systems are characterized by enhanced quantum fluctuations, which often result in interesting collective properties. Recently two-dimensional bilayer systems, such as twisted bilayer graphene or ultracold atoms, have sparked a lot of interest because they can host rich phase diagrams, including unconventional superconductivity. Here we present a theoretical proposal for realizing high temperature pairing of fermions in a class of bilayer Hubbard models. We introduce a general, highly efficient pairing mechanism for mobile dopants in antiferromagnetic Mott insulators, which leads to binding energies proportional to $t^{1/3}$, where $t$ is the hopping amplitude of the charge carriers. The pairing is caused by the energy that one charge gains when retracing a string of frustrated bonds created by another charge. Concretely, we show that this mechanism leads to the formation of highly mobile, but tightly bound pairs in the case of mixed-dimensional Fermi-Hubbard bilayer systems. This setting is closely related to the Fermi-Hubbard model believed to capture the physics of copper oxides, and can be realized by currently available ultracold atom experiments.

6+2+12 pages, 3+0+5 figures

References in corpus (11)

• Many-Body Physics with Ultracold Gases
• Time-resolved Observation and Control of Superexchange Interactions with Ultracold Atoms in Optical Lattices
• Fractionalized Fermi liquids
• Time-evolving a matrix product state with long-ranged interactions
• Exploration of doped quantum magnets with ultracold atoms
• Competing magnetic orders in a bilayer Hubbard model with ultracold atoms
• String excitations of a hole in a quantum antiferromagnet and photoelectron spectrospopy
• Microscopic spinon-chargon theory of magnetic polarons in the t-J model
• Anomalous Fermi-Surface Dependent Pairing in a Self-Doped High-Tc Superconductor
• Uniform Mixing of Antiferromagnetism and High-Tc Superconductivity in Electron-doped Layers in Four-layered Ba2Ca3Cu4O8F2 : A New Phenomenon in an Electron Underdoped RegimePhenomenon in an Electron Underdoped Regime
• Dynamical signatures of thermal spin-charge deconfinement in the doped Ising model

Cited by in corpus (31)

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• Magnetically mediated hole pairing in fermionic ladders of ultracold atoms
• Observation of Nagaoka Polarons in a Fermi-Hubbard Quantum Simulator
• Pair correlations in the two-orbital Hubbard ladder: Implications on superconductivity in the bilayer nickelate La${}_3$Ni${}_2$O${}_7$
• Strong Pairing Originated from an Emergent ${\mathbb{Z}}_2$ Berry Phase in La${}_3$Ni${}_2$O${}_7$
• Orbital-selective Superconductivity in the Pressurized Bilayer Nickelate La${}_3$Ni${}_2$O${}_7$: An Infinite Projected Entangled-Pair State Study
• Effect of Rare-earth Element Substitution in Superconducting R${}_3$Ni${}_2$O${}_7$ Under Pressure
• Formation of spontaneous density-wave patterns in DC driven lattices
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• Pairing of holes by confining strings in antiferromagnets
• Formation of stripes in a mixed-dimensional cold-atom Fermi-Hubbard system
• Bilayer Hubbard model: Analysis based on the fermionic sign problem
• Optical superlattice for engineering Hubbard couplings in quantum simulation
• Quantifying hole-motion-induced frustration in doped antiferromagnets by Hamiltonian reconstruction
• Dichotomy of heavy and light pairs of holes in the $t-J$ model
• Duality between open systems and closed bilayer systems: Thermofield double states as quantum many-body scars
• Exact dynamics of two holes in two-leg antiferromagnetic ladders
• Particle zoo in a doped spin chain: Correlated states of mesons and magnons
• Photoinduced $\eta$-pairing correlation in the Hubbard ladder
• A unified theory of strong coupling Bose polarons: From repulsive polarons to non-Gaussian many-body bound states
• Observation of excitons bound by antiferromagnetic correlations
• Attraction versus repulsion between doublons or holons in Mott-Hubbard systems
• The competition between antiferromagnetism and superconductivity in a doped Hubbard model with anisotropic interaction
• Thermally induced localization of dopants in a magnetic spin ladder
• Extended $s$-wave pairing from an emergent Feshbach resonance in bilayer nickelate superconductors
• Spin-charge correlations in finite one-dimensional multi-band Fermi systems
• Dopant pairing in a disordered magnetic spin ladder
• Magnetic correlations in the $SU(3)$ triangular-lattice $t$-$J$ model at finite doping
• Double Supersolid Phase in a Bosonic t-J-V Model with Rydberg Atoms
• Spinon Singlet Pairing: Origin of $d$-Wave Sign Structure in a Partially-Filled Stripe