Canted magnetism and ${\mathbb{Z}}_2$ fractionalization in metallic states of the Lieb lattice Hubbard model near quarter filling

Alexander Nikolaenko, Pietro M. Bonetti, Anant Kale +3

A recent experiment has examined ultracold, fermionic, spin-1/2 ${}^6$Li atoms in the Lieb lattice at different Hubbard repulsion $U$ and filling fractions $\hat{I}½$ (Lebrat et al. arXiv:…