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Probing the quantum phase transition in Mott insulator BaCoS$$_{2}$$ tuned by pressure and Ni substitution

圧力とNi置換により調整したモット絶縁体BaCoS$$_{2}$$における量子相転移観測

Guguchia, Z.*; Frandsen, B. A.*; Santos-Cottin, D.*; 社本 真一; Gauzzi, A.*; 植村 泰朋*; 他12名*

Guguchia, Z.*; Frandsen, B. A.*; Santos-Cottin, D.*; Shamoto, Shinichi; Gauzzi, A.*; Uemura, Yasutomo*; 12 of others*

$$mu$$SRを用いて、BaCoS$$_{2}$$を圧力とNi置換でモット転移を調整し、量子相転移の様子を調べた。その結果、ゼロ温度で両方の量子相転移が一次転移であることがわかった。

We have studied the Mott transition of BaCoS$$_{2}$$ by pressure and Ni substitution using $$mu$$SR, and examined the appearance of the quantum phase transition. The results show that both quantum phase transitions are first-order transitions at zero temperature.

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