Pressure-induced superconductivity and structural transition in ferromagnetic CrSiTe3
Pressure-induced superconductivity and structural transition in ferromagnetic CrSiTe3
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铁磁 CrSiTe3 中的压力诱导超导和结构转变
DOI：
10.1103/physrevb.102.144525
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发表时间：
2020-10-28
影响因子：
3.7
通讯作者：
Wang, Meng
中科院分区：
文献类型：
--
作者：
Cai, Wanping;Sun, Hualei;Wang, Meng
层状结构材料已成为研究基础物理机制和探索潜在应用的肥沃操场。在这里，我们报告的铁磁货车德瓦尔斯CrSiTe 3通过高压同步辐射X射线衍射，电阻和磁阻测量的调查。在压缩下，CrSiTe 3经历绝缘体-金属转变和类似于7.5 GPa的结构转变。随着结构转变，磁电阻变号，负霍尔系数急剧增大，在3 K出现超导现象。超导电性持续到最高测量压力47.1 GPa，在类似于30 GPa的最大Tc接近4.5 K。我们的结果表明，CrSiTe 3是顺磁性的压力范围内的超导性。铁磁CrSiTe 3在压力下的超导电性和磁转变的发现为探索Cr基二维货车德瓦耳斯材料中超导电性和磁之间的相互作用提供了新的视角。
Layered structural materials have been a fertile playground to investigate mechanisms of fundamental physics and explore potential applications. Here, we report investigations on ferromagnetic van der Waals CrSiTe3 via high-pressure synchrotron x-ray diffraction, electrical resistance, and magnetoresistance measurements. Under compression, CrSiTe3 undergoes an insulator-metal transition and a structural transition at similar to 7.5 GPa. Concomitantly with the structural transition, the magnetoresistance changes sign, the negative Hall coefficient increases dramatically, and superconductivity emerges at 3 K. The superconductivity persists up to the highest measured pressure of 47.1 GPa with a maximum T-c approximate to 4.5 K at similar to 30 GPa. Our results suggest that CrSiTe3 is paramagnetic in the pressure range of superconductivity. The discoveries of superconductivity and magnetic transition in ferromagnetic CrSiTe3 under pressure provide new perspectives to explore the interplay between superconductivity and magnetism in Cr-based two-dimensional van der Waals materials.