arxiv: 1902.09133 · v1 · pith:VHR72O2Pnew · submitted 2019-02-25 · ❄️ cond-mat.supr-con

⁷⁷Se-NMR Study under Pressure on 12%-S Doped FeSe

Takanori Kuwayama , Kohei Matsuura , Yuta Mizukami , Shigeru Kasahara , Yuji Matsuda , Takasada Shibauchi , Yoshiya Uwatoko , Naoki Fujiwara This is my paper

classification ❄️ cond-mat.supr-con

keywords pressurephasedopedexhibitedfesefieldfluctuationsoptimal

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The 12%-S doped FeSe system has a high Tc of 30 K at a pressure of 3.0 GPa. We have successfully investigated its microscopic properties for the first time via $^{77}$Se-NMR measurements under pressure. The antiferromagnetic (AFM) fluctuations at the optimal pressure (~3 GPa) exhibited unexpected suppression compared with the AFM fluctuations at ambient pressure, even though the optimal pressure is close to the phase boundary of the AFM phase induced at the high-pressure region. In addition, we revealed that the SC phase at an applied field of 6.02 T exhibited a remarkable double-dome structure in the pressure-temperature phase diagram, unlike the SC phase at zero field.

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⁷⁷Se-NMR Study under Pressure on 12%-S Doped FeSe

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