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

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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.