Here we report a pressure-induced reemergence of superconductivity in a recently discovered superconductor ${\mathrm{K}}_2{\mathrm{Mo}}_3{\mathrm{As}}_3$, which is an experimental case observed in quasi-one-dimensional superconductors. We find that, after full suppression of the ambient-pressure superconducting (SC-I) state at 8.7 GPa, an intermediary nonsuperconducting state sets in and prevails to the pressure up to 18.2 GPa, however, above this pressure a different superconducting (SC-II) state appears unexpectedly. High pressure x-ray diffraction measurements demonstrate that the pressure-induced dramatic change of the lattice parameter $c$ contributes mainly to the emergence of the SC-II state. Combined with the theoretical calculations on band structure, our results suggest that the reemergence of superconductivity is associated with the change of the complicated interplay among different orbital electrons, driven by the pressure-induced anisotropic change of the lattice.

中文翻译：

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准准一维超导体K2Mo3As3中超导电性的出现

在这里，我们报告了在最近发现的超导体中压力引起的超导的重新出现 ${\mathrm{ķ}}_2{莫}_3{如}_3$，这是在准一维超导体中观察到的实验案例。我们发现，在将环境压力超导（SC-1）状态完全抑制为8.7 GPa之后，中间的非超导状态进入并占主导地位，压力高达18.2 GPa，但是，在此压力之上，则出现另一种超导（SC-I）。 II）状态意外出现。高压X射线衍射测量表明，压力引起的晶格参数急剧变化$C$主要为SC-II国家的崛起做出了贡献。结合能带结构的理论计算，我们的结果表明，超导的重新出现与不同轨道电子之间复杂的相互作用的变化有关，这是由晶格的压力引起的各向异性变化驱动的。