论文标题
在LAAGSB中的电荷密度波关键点上观察超导性及其增强
Observation of superconductivity and its enhancement at the charge density wave critical point in LaAgSb$_2$
论文作者
论文摘要
我们在环境压力下发现LAAGSB $ _2 $中的超导率（SC），并在压力下与电荷密度波（CDW）的密切相关。超导过渡温度（$ T_C $）在CDW临界压力为3.2 GPA时表现出尖峰。我们证明，居住在SB平方网的载体不仅在CDW的形成中至关重要，而且在SC中也至关重要。此外，原始LAAGSB $ _2 $中的理论EPC强度无法解释以$ T_C \ sim 1 $ K的观察到的峰，这表明一种附加机制仅在CDW临界压力周围加强SC。
We discover superconductivity (SC) in LaAgSb$_2$ at ambient pressure and its close correlation with a charge density wave (CDW) under pressure. The superconducting transition temperature ($T_c$) exhibits a sharp peak at the CDW critical pressure of 3.2 GPa. We demonstrate that the carriers inhabiting the Sb-square net is crucial not only in the formation of CDW but also in SC for their relatively strong electron-phonon coupling (EPC). Furthermore, theoretical EPC strength in pristine LaAgSb$_2$ cannot explain the observed peak with $T_c\sim 1$ K, which indicates that an additional mechanism reinforces SC only around the CDW critical pressure.
