@article{oai:repo.qst.go.jp:00086286,
 author = {Sakai, Toru and Yamada, Takaharu and Nakanishi, Ryosuke and Furuchi, Rito and Nakano, Hiroki and Kaneyasu, Hirono and Okamoto, Kiyomi and Tonegawa, Takashi and Toru, Sakai},
 journal = {Journal of the Physical Society of Japan},
 month = {Jun},
 note = {The S = 2 quantum spin chain with the single-ion anisotropy D and the biquadratic exchange interaction JBQ is
investigated using the numerical diagonalization of finite-size clusters and the level spectroscopy analysis. It is found
that the intermediate-D phase corresponding to the symmetry protected topological (SPT) phase appears in a wide region
of the ground state phase diagram. We also obtain the phase diagram at the half of the saturation magnetization which
includes the SPT plateau phase.},
 pages = {074702-1--074702-5},
 title = {S = 2 Quantum Spin Chain with the Biquadratic Exchange Interaction},
 volume = {91},
 year = {2022}
}