77Se-NMR Study under Pressure on 12%-S Doped FeSe
77Se-NMR Study under Pressure on 12%-S Doped FeSe
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DOI：
10.7566/jpsj.88.033703
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发表时间：
2019-03-15
影响因子：
1.7
通讯作者：
Fujiwara, Naoki
中科院分区：
文献类型：
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作者：
Kuwayama, Takanori;Matsuura, Kohei;Fujiwara, Naoki
在3.0 GPa的压力下，掺12% s的FeSe体系的温度高达30K。我们首次通过压力下的se -77核磁共振测量成功地研究了它的微观性质。与环境压力下的AFM波动相比，在最优压力下（类似于3 GPa）的反铁磁（AFM）波动表现出意想不到的抑制，即使最优压力接近高压区诱导的AFM相的相边界。此外，我们还发现，在6.02 T的施加场下，SC相在压力-温度相图中表现出明显的双圆顶结构，而在零场下，SC相则表现出明显的双圆顶结构。
The 12%-S doped FeSe system has a high T-c of 30K at a pressure of 3.0 GPa. We have successfully investigated its microscopic properties for the first time via Se-77-NMR measurements under pressure. The antiferromagnetic (AFM) fluctuations at the optimal pressure (similar to 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.