Evidence of attraction between charge-carriers in a doped Mott insulator

Abstract

Recent progress in optically trapped ultracold atomic gases is now making it possible to access microscopic observables in doped Mott insulators, which are the parent states of high-temperature superconductors. This makes it possible to address longstanding questions about the temperature scales at which attraction between charge carriers are present, and their mechanism. Controllable theoretical results for this problem are not available at low temperature due to the sign problem. In this work, we employ worm-algorithm Monte Carlo to obtain completely unbiased results for two charge carriers in a Mott insulator. Our method gives access to lower temperatures than what is currently possible in experiments, and provides evidence for attraction between dopants at a temperature scale that is now feasible in ultracold atomic systems. We also report on spin-correlations in the presence of charge carriers, which are directly comparable to experiments.

arXiv comment6 pages, 5 figures + Supplementary information

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Cited by in corpus (6)

• Microscopic evolution of doped Mott insulators from polaronic metal to Fermi liquid
• Exploration of doped quantum magnets with ultracold atoms
• Magnetically mediated hole pairing in fermionic ladders of ultracold atoms
• Numerically exact mimicking of quantum gas microscopy for interacting lattice fermions
• Kinetic magnetism in the crossover between the square and triangular lattice Fermi-Hubbard models
• Finite temperature dopant-induced spin reorganization explored via tensor networks in the two-dimensional $t$-$J$ model