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arXiv · 2208.10983

Translational Symmetry Broken Magnetization Plateau of the $S=2$ Antiferromagnetic Chain with Anisotropies

Takaharu Yamada·Ryosuke Nakanishi·Rito Furuchi·Hiroki Nakano·Hirono Kaneyasu·Kiyomi Okamoto·Takashi Tonegawa·Tôru Sakai
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Abstract

The magnetization plateau of the $S=2$ antiferromagnetic chain with interaction and single-ion anisotropies is investigated using the numerical diagonalization of finite-size clusters and some size scaling analyses. The previous level spectroscopy analysis indicated that two different magnetization plateau phases appear at half of the saturation magnetization. One is due to the large-$D$ mechanism and the other is due to the Haldane one. In the present study the phase diagram is extended to wider region of the anisotropies. As a result we find another half magnetization plateau phase, where the translational symmetry is spontaneously broken .

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Takaharu Yamada, Ryosuke Nakanishi, Rito Furuchi, Hiroki Nakano, Hirono Kaneyasu, Kiyomi Okamoto, Takashi Tonegawa, Tôru Sakai. 2022-08-23. Translational Symmetry Broken Magnetization Plateau of the $S=2$ Antiferromagnetic Chain with Anisotropies. https://doi.org/10.7566/jpscp.38.011163

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