论文标题
非中心对称拓扑材料Zrruas中的压力调节超导性
Pressure-Tuning Superconductivity in Noncentrosymmetric Topological Materials ZrRuAs
论文作者
论文摘要
最近，预测，众所周知的非中性超对象超导体的三元过渡金属pnictides tt'x（t = zr，hf; t'= ru; x = p，AS）携带非平凡的散装拓扑。在这项工作中，我们系统地研究Zrruas对外部压力的电子响应。在环境压力下，Zrruas显示出与TC〜7.74 K的超导性，而对于Zrruas，获得了〜13.03 t的大临界场，这与弱耦合Pauli限制相当。 Zrruas的电阻率随压力增加而表现出非单调演化。超导过渡温度TC随着施加的压力增加，并在2.1 GPA时达到7.93 K的最大值，然后减少。非平凡的拓扑结构是强大的，并且一直持续到高压制度。考虑到这种材料中强大的超导性和有趣的拓扑结构，我们的结果可能有助于研究拓扑电子状态和超导性之间的相互作用。
Recently, the hexagonal phase of ternary transition metal pnictides TT'X (T = Zr, Hf; T'= Ru; X = P, As), which are well-known noncentrosymmetric superconductors, were predicted to host nontrivial bulk topology. In this work, we systematically investigate the electronic responses of ZrRuAs to external pressure. At ambient pressure, ZrRuAs show superconductivity with Tc ~ 7.74 K, while a large upper critical field ~ 13.03 T is obtained for ZrRuAs, which is comparable to the weak-coupling Pauli limit. The resistivity of ZrRuAs exhibits a non-monotonic evolution with increasing pressure. The superconducting transition temperature Tc increases with applied pressure and reaches a maximum value of 7.93 K at 2.1 GPa, followed by a decrease. The nontrivial topology is robust and persists up to the high-pressure regime. Considering both robust superconductivity and intriguing topology in this material, our results could contribute to studies of the interplay between topological electronic states and superconductivity.
