Wu Ming, Lv Xindeng, Zhao Wendi, Liu Sirui, Dan Yaqian, Fang Yuqiang, Huang Yanping, Cui Tian
Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China.
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China.
J Phys Condens Matter. 2024 Jul 22;36(42). doi: 10.1088/1361-648X/ad5597.
The exploration of the superconducting properties of antiferromagnetic parent compounds containing transition metals under pressure provides a unique idea for finding and designing superconducting materials with better performance. In this paper, the close relationship between the possible superconductivity and structure phase transition of the typical van der Waals layered material 1-CrSeinduced by pressure is studied by means of electrical transport and x-ray diffraction for the first time. We introduce the possibility of pressure-induced superconductivity at 20 GPa, with a criticalof approximately at 4 K. The superconductivity persists up to the highest measured pressure of 70 GPa, with a maximum∼ 5 K at 24 GPa. We observed a structure phase transition from-31 to2/space group in the range of 9.4-11.7 GPa. The results show that the structural phase transition leads to the metallization of 1-CrSeand the further pressure effect makes the superconductivity appear in the new structure. The material undergoes a transition from a two-dimensional layered structure to a three-dimensional structure under pressure. This is the first time that possible superconductivity has been observed in 1-CrSe.
对含过渡金属的反铁磁母体化合物在压力下的超导特性进行探索，为寻找和设计性能更优的超导材料提供了独特思路。本文首次通过电输运和X射线衍射手段，研究了典型范德华层状材料1-CrSe在压力作用下可能的超导性与结构相变之间的紧密关系。我们介绍了在20吉帕压力下出现压力诱导超导性的可能性，其临界温度约为4开尔文。超导性一直持续到最高测量压力70吉帕，在24吉帕时最高临界温度约为5开尔文。我们观察到在9.4 - 11.7吉帕范围内发生了从-31到2/空间群的结构相变。结果表明，结构相变导致1-CrSe金属化，进一步的压力作用使新结构中出现超导性。该材料在压力下从二维层状结构转变为三维结构。这是首次在1-CrSe中观察到可能的超导性。
