Pairing dome from an emergent Feshbach resonance in a strongly repulsive bilayer model
Hannah Lange, Lukas Homeier, Eugene Demler, Ulrich Schollwöck, Annabelle Bohrdt, Fabian Grusdt
Abstract
Understanding unconventional superconductivity involves unraveling the pairing mechanism of charge carriers in doped antiferromagnets, where Cooper pairs form despite repulsive interactions. This paper examines a model relevant to bilayer nickelate superconductors, revealing a transition from tightly bound to spatially extended pairs as repulsion increases. At strong repulsion, a microscopic pairing mechanism is identified that leads to robust pairing with a peak in binding energies at around 30% doping, which can be tested using quantum simulators.
Topics & Concepts
PairingFeshbach resonanceBilayerDome (geology)PhysicsResonance (particle physics)Condensed matter physicsChemistryAtomic physicsGeologyQuantum mechanicsMoleculeMembraneSuperconductivityGeomorphologyBiochemistryTheoretical and Computational PhysicsNonlinear Dynamics and Pattern FormationNonlinear Photonic Systems