S=2 Quantum Spin Chain with the Biquadratic Exchange Interaction
| Autor: | Tôru Sakai, Takaharu Yamada, Ryosuke Nakanishi, Rito Furuchi, Hiroki Nakano, Hirono Kaneyasu, Kiyomi Okamoto, Takashi Tonegawa |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
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| Popis: | The $S=2$ quantum spin chain with the single-ion anisotropy $D$ and the biquadratic exchange interaction $J_{\rm BQ}$ 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. to be published in J. Phys. Soc. Jpn |
| Databáze: | OpenAIRE |
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