Harnessing the Interplay of Superconductivity and Charge Order in Rare-Earth Doped Cuprates for Josephson Junction Applications

利用联盟国际量子催化剂基金，我提议与美国三个实验凝聚态物理小组建立研究合作，重点研究稀土掺杂铜酸盐中出现的超导(SC)和电荷有序(CO)的量子现象。我们的研究目标有两个：1)利用X射线散射、磁共振和电传输探针的独特组合，进一步阐明Sc和CO之间的相互作用，据信这两者都是由于强电子关联；2)探索利用这种现象的相互作用的具体方法，用于约瑟夫森结应用，使用脉冲激光沉积合成的铜酸盐薄膜和异质结构以及纳米级离子束刻蚀技术。拟议中的研究将及时重新关注铜酸盐超导体，这种超导体长期以来一直被视为一类在技术上具有颠覆性的量子材料。我们的研究成果将为开发基于铜酸盐和其他复合氧化物的量子电子器件提供重要的新知识。

With the Alliance International Quantum Catalyst grant, I propose to forge a research collaboration with 3 experimental condensed matter physics groups in the US, focused on the quantum phenomena of superconductivity (SC) and charge order (CO) that occur in the rare-earth doped cuprates. Our research goal is twofold: 1) to further elucidate the interplay between SC and CO, both believed to be due to strong electron correlations, using a unique combination of x-ray scattering, magnetic resonance and electrical transport probes; 2) to explore concrete ways to harness this interplay of phenomena for Josephson junction applications, using cuprate thin-films and heterostructures synthesized by pulsed laser deposition as well as nanoscale ion-beam etching techniques. The proposed research will re-focus timely attention on cuprate superconductors, which have long been regarded as a technologically disruptive class of quantum materials. Successful outcome of our research will contribute vital new knowledge for developing quantum electronic devices based on cuprates and other complex oxides.