Year: 2026
Type: article
Abstract: We demonstrate the existence of an unconventional pairing state in photodoped Mott insulators on ladder and quasi-two-dimensional geometries, characterized by quasi-long-range doublon-holon correlations that signal Mott exciton condensation. The doublon-holon pairing exhibits correlations of $d$-wave-like symmetry, reminiscent of superconducting pairing in chemically doped Mott insulators. By constructing the phase diagram, using density matrix renormalization group, we reveal that the doublon-holon pairing state in the photodoped ladder emerges between the spin-singlet, charge-density-wave, and $η$-pairing phases. Our study suggests that the interplay of charge, spin, and $η$-spin degrees of freedom can give rise to exotic quantum many-body states in photodoped Mott insulators.
DOI: 10.1103/dc6n-hrzj
Authors: Ryota Ueda, Madhumita Sarkar, Zala Lenarčič, Denis Golež, Kazuhiko Kuroki, Tatsuya Kaneko
Language: English
Topic: Quantum many-body systems
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: Understanding and Designing of New Nickelate Superconductors from the Viewpoint of Multiorbital Electronic Structures, G2980829048, G3237360541, Real and reciprocal spacetime imaging of many-body excitons and quantum phase control, Correlated electronic states and photoinduced phenomena in bilayer systems, G5624280360, G5624586358, G5635309386, Theory of preformed pair states and nonequilibrium dynamics in materials with strong-coupling excitonic condensation, G6741928566, Weakly driven quantum symmetries, Quantum digital twins for quantum dynamics based on hardware-tailored tensor networks, Creation of unconventional high temperature superconductors through manifestation of multilayer Hubbard models, Multi-scale modeling of non-equilibrium quantum materials, Solid state theory and statistical physics
OpenAlex ID: W4415979407