论文标题
（ca $ _ {x} $ sr $ _ {1-x} $）$ _ 3 $ rh $ _4 $ sn $ _ {13}
Peak in the critical current density in (Ca$_{x}$Sr$_{1-x}$)$_3$Rh$_4$Sn$_{13}$ tuned towards the structural quantum critical point
论文作者
论文摘要
（ca $ _ {x} $ sr $ _ {1-x} $）$ _ 3 $ rh $ _4 $ sn $ _ {13} $是一个罕见的系统，已显示出在结构性量子关键率和超导性之间显示有趣的相互作用。假定的结构量子临界点隐藏在宽阔的超导圆顶之下，据信被认为会引起优化的超导属性（ca $ _ {x} $ _ {x} $ sr $ _ {1-x} $）$ _ 3 $ RH $ rh $ _4 $ _4 $ _4 $ sn $ _ {13} $。但是，超导圆顶本身的存在本身会阻碍通过电运传输的量子临界点的检查，因为运输系数在超导状态下消失。在这里，我们使用临界电流密度在超导圆顶内探索。我们的测量结果揭示了当系统调谐到结构量子临界点时，在零温度极限处的临界电流密度大大提高。
(Ca$_{x}$Sr$_{1-x}$)$_3$Rh$_4$Sn$_{13}$ is a rare system that has been shown to display an interesting interplay between structural quantum criticality and superconductivity. A putative structural quantum critical point, which is hidden beneath a broad superconducting dome, is believed to give rise to optimized superconducting properties in (Ca$_{x}$Sr$_{1-x}$)$_3$Rh$_4$Sn$_{13}$. However, the presence of the superconducting dome itself hinders the examination of the quantum critical point through electrical transport, as the transport coefficients vanish in the superconducting state. Here, we use critical current density to explore within the superconducting dome. Our measurements reveal a large enhancement of the critical current density at the zero-temperature limit when the system is tuned towards the structural quantum critical point.
