Weak ferromagnetism in the square-lattice Heisenberg $J_1$-$J_2$-$J_2^{\prime }$ model with easy-axis single-ion anisotropy

Bin-Zhou Mi, Qiang Gu

Motivated by recent experimental realizations of the Heisenberg model and two-dimensional altermagnetism using ultracold atoms in optical lattices, we systematically investigate th…