Observation of 2D fermionic Mott insulators of ${}^{40}$K with single-site resolution

Lawrence W. Cheuk, Matthew A. Nichols, Katherine R. Lawrence +3

We report on the site-resolved observation of characteristic states of the two-dimensional repulsive Fermi-Hubbard model, using ultracold ${}^{40}$K atoms in an optical lattice. By v…