Dichotomy of heavy and light pairs of holes in the $t-J$ model

Abstract

A key step in unraveling the mysteries of materials exhibiting unconventional superconductivity is to understand the underlying pairing mechanism. While it is widely agreed upon that the pairing glue in many of these systems originates from antiferromagnetic spin correlations, a microscopic description of pairs of charge carriers remains lacking. Here we use state-of-the art numerical methods to probe the internal structure and dynamical properties of pairs of charge carriers in quantum antiferromagnets in four-legged cylinders. Exploiting the full momentum resolution in our simulations, we are able to distinguish two qualitatively different types of bound states: a highly mobile, meta-stable pair, which has a dispersion proportional to the hole hopping $t$, and a heavy pair, which can only move due to spin exchange processes and turns into a flat band in the Ising limit of the model. Understanding the pairing mechanism can on the one hand pave the way to boosting binding energies in related models, and on the other hand enable insights into the intricate competition of various phases of matter in strongly correlated electron systems.

arXiv comment6+7 pages, 5+10 figures; updated, corrected version

References in corpus (27)

• A Common Thread: the pairing interaction for the unconventional superconductors
• Theory of Intertwined Orders in High Temperature Superconductors
• Time-evolution methods for matrix-product states
• Competing states in the t-J model: uniform d-wave state versus stripe state
• The Hubbard Model
• High-temperature superfluidity of fermionic atoms in optical lattices
• Efficient numerical simulations with Tensor Networks: Tensor Network Python (TeNPy)
• Time-evolving a matrix product state with long-ranged interactions
• Phase-sensitive Evidence for d-wave Pairing Symmetry in Electron-doped Cuprate Superconductors
• Absence of superconductivity in the pure two-dimensional Hubbard model
• The phase diagram of the anisotropic spin-2 XXZ model: an infinite system DMRG study
• Exploration of doped quantum magnets with ultracold atoms
• On the Electron Pairing Mechanism of Copper-Oxide High Temperature Superconductivity
• Magnetically mediated hole pairing in fermionic ladders of ultracold atoms
• Angle-resolved photoemission spectroscopy with quantum gas microscopes
• Microscopic spinon-chargon theory of magnetic polarons in the t-J model
• Angle-resolved photoemission spectroscopy of a Fermi-Hubbard system
• Strong pairing in mixed dimensional bilayer antiferromagnetic Mott insulators
• A comprehensive numerical and analytical study of two holes doped into the 2D t-J model
• Bound states of holes in an antiferromagnet
• Preparation and detection of d-wave superfluidity in two-dimensional optical superlattices
• Dynamical formation of a magnetic polaron in a two-dimensional quantum antiferromagnet
• Low energy states with different symmetries in the t-J model with two holes on a 32-site lattice
• Phase sensitive measurements of order parameters for ultracold atoms through two particles interferometry
• Pairing of holes by confining strings in antiferromagnets
• Coincidence angle-resolved photoemission spectroscopy: Proposal for detection of two-particle correlations
• Antiferromagnetic bosonic $t$-$J$ models and their quantum simulation in tweezer arrays

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• Neural network approach to quasiparticle dispersions in doped antiferromagnets
• Feshbach hypothesis of high-Tc superconductivity in cuprates
• Scattering theory of mesons in doped antiferromagnetic Mott insulators: Multichannel perspective and Feshbach resonance
• Observation of excitons bound by antiferromagnetic correlations
• Post-experiment coincidence detection techniques for direct detection of two-body correlations
• Exploring kinetically induced bound states in triangular lattices with ultracold atoms: spectroscopic approach
• Emergent spinon-holon Feshbach resonance in a doped Majumdar-Ghosh model
• Coincidence detection techniques for direct measurement of many-body correlations in strongly correlated electron systems