论文标题
压力诱导MNSE的超导性
Pressure induced superconductivity in MnSe
论文作者
论文摘要
FESE和相关化合物中的丰富现象引起了极大的兴趣，因为它提供了肥沃的材料，以进一步了解高温超导性的机理。自然的后续工作是研究MNSE超导性的可能性。结果表明，在压力下，MNP用TC〜1 K产生超导。我们在这项工作中证明了高压可以在环境条件下观察到的MNSE晶体的复杂磁性特征。发现在压力下的MNSE经历了几种结构转换：立方相首先在约12 GPA处部分转换为六边形相，晶体表现出立方，六角形和矫正相的共存，从16 GPA从16 GPA到30 GPA，以及以上30 GPA，晶体表现出单或单位或单一或单位相位。首先，通过磁性测量值在压力〜12 GPA时（通过电阻测量）观察到超导性。最高的TC为〜9 K（磁性结果），在〜35 GPA时。我们的观察结果表明，观察到的超导性可能与压力诱导的结构变化密切相关。但是，金属和绝缘边界之间的界面也可能对MNSE压力引起的超导性起重要作用。
The rich phenomena in the FeSe and related compounds have attracted great interests as it provides fertile material to gain further insight into the mechanism of high temperature superconductivity. A natural follow-up work was to look into the possibility of superconductivity in MnSe. It was shown that MnP becomes superconducting with Tc ~ 1 K under pressure. We demonstrated in this work that high pressure can effectively suppress the complex magnetic characters of MnSe crystal when observed at ambient condition. MnSe under pressure is found to undergo several structural transformations: the cubic phase first partially transforms to the hexagonal phase at about 12 GPa, the crystal exhibits the coexistence of cubic, hexagonal and orthorhombic phases from 16 GPa to 30 GPa, and above 30 GPa the crystal shows a single orthorhombic phase. Superconductivity with Tc ~ 5 K was first observed at pressure ~12 GPa by magnetic measurements (~16 GPa by resistive measurements). The highest Tc is ~ 9 K (magnetic result) at ~35 GPa. Our observations suggest the observed superconductivity may closely relate to the pressure-induced structural change. However, the interface between the metallic and insulating boundaries may also play an important role to the pressure induced superconductivity in MnSe.
