Meson formation in mixed-dimensional t-J models

Abstract

Surprising properties of doped Mott insulators are at the heart of many quantum materials, including transition metal oxides and organic materials. The key to unraveling complex phenomena observed in these systems lies in understanding the interplay of spin and charge degrees of freedom. One of the most debated questions concerns the nature of charge carriers in a background of fluctuating spins. To shed new light on this problem, we suggest a simplified model with mixed dimensionality, where holes move through a Mott insulator unidirectionally while spin exchange interactions are two dimensional. By studying individual holes in this system, we find direct evidence for the formation of mesonic bound states of holons and spinons, connected by a string of displaced spins -- a precursor of the spin-charge separation obtained in the 1D limit of the model. Our predictions can be tested using ultracold atoms in a quantum gas microscope, allowing to directly image spinons and holons, and reveal the short-range hidden string order which we predict in this model.

7 pages, 6 figures, 4 pages methods section

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Cited by in corpus (34)

• String patterns in the doped Hubbard model
• Exploration of doped quantum magnets with ultracold atoms
• Classifying Snapshots of the Doped Hubbard Model with Machine Learning
• Quench Dynamics of a Fermi Gas with Strong Non-Local Interactions
• Magnetically mediated hole pairing in fermionic ladders of ultracold atoms
• Microscopic spinon-chargon theory of magnetic polarons in the t-J model
• Parton theory of ARPES spectra in anti-ferromagnetic Mott insulators
• Strong pairing in mixed dimensional bilayer antiferromagnetic Mott insulators
• Enhanced Superexchange in a Tilted Mott Insulator
• Fractons from polarons
• Z2 parton phases in the mixed-dimensional $t-J_z$ model
• Nonequilibrium Hole Dynamics in Antiferromagnets: Damped Strings and Polarons
• Formation of stripes in a mixed-dimensional cold-atom Fermi-Hubbard system
• Optical superlattice for engineering Hubbard couplings in quantum simulation
• Interaction induced fractionalization and topological superconductivity in the polar molecules anisotropic $t-J$ model
• Fractons from frustration in hole-doped antiferromagnets
• Quantifying hole-motion-induced frustration in doped antiferromagnets by Hamiltonian reconstruction
• From "Weak" to "Strong" Hole Confinement in a Mott Insulator
• Fractons from a liquid of singlet pairs
• Exploring spin-squeezing in the Mott insulating regime: role of anisotropy, inhomogeneity and hole doping
• Exact dynamics of two holes in two-leg antiferromagnetic ladders
• Equilibrium and non-equilibrium dynamics of a hole in a bilayer antiferromagnet
• Wave function and spatial structure of polarons in an antiferromagnetic bilayer
• Particle zoo in a doped spin chain: Correlated states of mesons and magnons
• Orbital Rotations induced by Charges of Polarons and Defects in Doped Vanadates
• The fate of pairing and spin-charge separation in the presence of long-range antiferromagnetism
• Geometric orthogonal metals: Hidden antiferromagnetism and pseudogap from fluctuating stripes
• Signatures of correlated magnetic phases in the local two-particle density matrix
• Phase Diagram of Mixed-Dimensional Anisotropic t-J-Models
• The fate of the spin polaron in the 1D antiferromagnets
• Spatial structure of magnetic polarons in strongly interacting antiferromagnets
• Magnetic monopole induced polarons in atomic superlattices
• Exact nonequilibrium hole dynamics, magnetic polarons and string excitations in antiferromagnetic Bethe lattices
• Theory of Angle Resolved Photoemission Spectroscopy of Altermagnetic Mott Insulators