论文标题
室温下的拓扑超导体\ b {eta} -pdbi2中的大型自旋转换
Large spin to charge conversion in topological superconductor \b{eta}-PdBi2 at room temperature
论文作者
论文摘要
\ b {eta} -pdbi2由于其前所未有的旋转轨道相互作用（SOC），其前瞻性具有同时具有拓扑表面和超导状态的能力引起了人们的关注。尽管大多数作品仅集中于研究其拓扑表面状态，但在这类量子材料中自旋和电荷自由度之间的耦合仍未开发。在这里，我们首先报告了一项研究在\ b {eta} -pdbi2超薄膜中通过分子束外延生长的超薄膜中的一项研究，利用旋转泵送技术来执行逆旋转霍尔效应测量。我们发现室温旋转大厅的fe/\ b {eta} -pdbi2，θ_sh= 0.037。该值比报道的常规超导体大的数量级，并且与最佳的SOC金属和拓扑绝缘子相当。我们的结果为开发基于超导体的自旋应用程序提供了途径。
\b{eta}-PdBi2 has attracted much attention for its prospective ability to possess simultaneously topological surface and superconducting states due to its unprecedented spin-orbit interaction (SOC). Whereas most works have focused solely on investigating its topological surface states, the coupling between spin and charge degrees of freedom in this class of quantum material remains unexplored. Here we first report a study of spin-to-charge conversion in a \b{eta}-PdBi2 ultrathin film grown by molecular beam epitaxy, utilizing a spin pumping technique to perform inverse spin Hall effect measurements. We find that the room temperature spin Hall angle of Fe/\b{eta}-PdBi2, θ_SH=0.037. This value is one order of magnitude larger than that of reported conventional superconductors, and is comparable to that of the best SOC metals and topological insulators. Our results provide an avenue for developing superconductor-based spintronic applications.
