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論文

Unique band structure of pressure induced semiconducting state in SmS characterized by $$^{33}$$S-nuclear magnetic resonance measurements

吉田 章吾*; 芳賀 芳範; 藤井 拓斗*; 中井 祐介*; 水戸 毅*; 他8名*

Journal of the Physical Society of Japan, 93(1), p.013702_1 - 013702_5, 2024/01

In Kondo insulators, a small energy gap evolves only at low temperatures. In this study, $$^{33}$$S-nuclear magnetic resonance measurements under high pressures are performed to clarify the electronic structure of SmS. The spin-lattice relaxation time, consisting of multiple components, was analyzed based on a periodic Anderson model with Bayesian inference, leading to a peculiar small gap state arising from strong hybridization.

論文

Nonmagnetic-magnetic transition and magnetically ordered structure in SmS

吉田 章吾*; 小山 岳秀*; 山田 陽彦*; 中井 祐介*; 上田 光一*; 水戸 毅*; 北川 健太郎*; 芳賀 芳範

Physical Review B, 103(15), p.155153_1 - 155153_5, 2021/04

 被引用回数:0 パーセンタイル:0(Materials Science, Multidisciplinary)

SmS, a protopypical intermediate valence compound, has been studied by performing high-pressure nuclear magnetic resonance measurements. The observation of an additional signal at high pressure gives evidence of a magnetic phase transition. The cancellation of the hyperfined fields at the S site suggests a type-II antiferromagnetic structure.

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