三重兼并费米子拓扑半金属 MoP 高压超导相的低压截获

碳化钨结构的三重兼并费米子拓扑半金属MoP高压下发生超导转变，然而，高压超导相能否在低压甚至常压截获尚不清楚.本文对两个密封于金刚石对顶砧中的MoP高压超导相在室温条件下进行快速卸压，通过测量低温电阻对温度的依赖关系，验证能否在低压甚至常压截获高压超导相.实验结果表明：初始压力61.5 GPa的样品#1,超导电性可截获的最低压力为44.2 GPa;初始压力95.0 GPa的样品#2,超导电性可截获的最低压力为3.5 GPa.

Interception of High-Pressure Superconducting Phase of Triply Degenerated Fermion Topological Semimetal MoP at Low Pressure

The triply degenerated fermion host topological semimetal MoP is pressurized to exhibit superconductivity. However, whether the high-pressure superconducting phase could be intercepted at ambient pressure or not is unclear. In this paper, we rapidly decompress two high-pressure superconducting phases sealed in the sample chamber of diamond anvil cell at room temperature, in order to check the possibility of interception at ambient pressure. It is demonstrated that the high-pressure superconducting phase of sample # 1 could be intercepted at 44. 2 GPa, and the high-pressure superconducting phase of sample # 2 could be intercepted at 3. 5 GPa. The high-pressure superconducting phase potentially to be intercepted at ambient pressure is a promising