Weak-coupling Mean-field Theory of Magnetic Properties of NiGa${}_2$S${}_4$

Takuji Nomura, Yuji Yamamoto, Kenji Yoshii

We report a mean-field theoretical study of a triangular lattice magnet NiGa${}_2$S${}_4$. Specifically, spiral mean-field theory is applied to a 17-band $d$-$p$ model constructed from…