@article{0bc6d6c44fb74fba91643d1cd11be5c1,
title = "Spin-imbalance in a 2D Fermi-Hubbard system",
abstract = "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.",
author = "Brown, {Peter T.} and Debayan Mitra and Elmer Guardado-Sanchez and Peter Schau{\ss} and Kondov, {Stanimir S.} and Ehsan Khatami and Thereza Paiva and Nandini Trivedi and Huse, {David A.} and Bakr, {Waseem S.}",
note = "Funding Information: This work was supported by NSF (grant DMR-1607277), the David and Lucile Packard Foundation (grant 2016-65128), and the Air Force Office of Scientific Research Young Investigator Research Program (grant FA9550-16-1-0269). W.S.B. was supported by an Alfred P. Sloan Foundation fellowship. P.T.B. was supported by the U.S. Department of Defense through the National Defense Science and Engineering Graduate Fellowship Program. E.K. was supported by NSF (grant DMR-1609560). T.P. was supported by Conselho Nacional de Desenvolvimento Cient{\'i}fico e Tecnol{\'o}gico, Funda{\c c}{\~a}o de Amparo {\`a} Pesquisa do Estado do Rio de Janeiro, and Instituto Nacional de Ci{\^e}ncia e Tecnologia de Informa{\c c}{\~a}o Qu{\^a}ntica. N.T. acknowledges funding from NSF (grant DMR1309461). We thank M. Rigol for providing exact diagonalization results for the imbalanced system at U = 0 to benchmark the NLCE. The data that support the plots presented in this paper and other findings of this study are available from the corresponding author upon reasonable request. The authors declare no competing financial interests. Publisher Copyright: {\textcopyright} 2017, American Association for the Advancement of Science. All rights reserved.",
year = "2017",
month = sep,
day = "29",
doi = "10.1126/science.aam7838",
language = "English (US)",
volume = "357",
pages = "1385--1388",
journal = "Science",
issn = "0036-8075",
publisher = "American Association for the Advancement of Science",
number = "6358",
}