Journal
SCIENCE
Volume 357, Issue 6358, Pages 1385-1388Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aam7838
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Funding
- NSF [DMR-1607277, DMR-1609560, DMR1309461]
- David and Lucile Packard Foundation [2016-65128]
- Air Force Office of Scientific Research Young Investigator Research Program [FA9550-16-1-0269]
- Alfred P. Sloan Foundation fellowship
- U.S. Department of Defense through the National Defense Science and Engineering Graduate Fellowship Program
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico, Fundacao de Amparo a Pesquisa do Estado do Rio de Janeiro
- Instituto Nacional de Ciencia e Tecnologia de Informacao Quantica
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1609560] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1607277] Funding Source: National Science Foundation
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The interplay of strong interactions and magnetic fields gives rise to unusual forms of superconductivity and magnetism in quantum many-body systems. Here, we present an experimental study of the two-dimensional Fermi-Hubbard model-a paradigm for strongly correlated fermions on a lattice-in the presence of a Zeeman field and varying doping. Using site-resolved measurements, we revealed anisotropic antiferromagnetic correlations, a precursor to long-range canted order. We observed nonmonotonic behavior of the local polarization with doping for strong interactions, which we attribute to the evolution from an antiferromagnetic insulator to a metallic phase. Our results pave the way to experimentally mapping the low-temperature phase diagram of the Fermi-Hubbard model as a function of both doping and spin polarization, for which many open questions remain.
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