A multicritical point of $S=1$ XXZ chain with single ion anisotropy

Shuichi Shiraishi, Kiyohide Nomura

We research the ground state of the $S=1$ XXZ spin chain with single ion anisotropy, focusing on XY1, XY2 (Spin Nematic), Neel, Haldane phases. Recently, it was reported that the…