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3D strain-induced superconductivity in La<sub>2</sub>CuO<sub>4+δ</sub> using a simple vertically aligned nanocomposite approach

3D strain-induced superconductivity in La2CuO4+δ using a simple vertically aligned nanocomposite approach

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CHOI, Eun-Mi, Angelo DI BERNARDO, Bonan ZHU, Ping LU, Hen ALPERN, Kelvin H. L. ZHANG, Tamar SHAPIRA, John FEIGHAN, Xing SUN, Judith L. MACMANUS-DRISCOLL, 2019. 3D strain-induced superconductivity in La2CuO4+δ using a simple vertically aligned nanocomposite approach. In: Science Advances. American Association for the Advancement of Science (AAAS). 5(4), eaav5532. eISSN 2375-2548. Available under: doi: 10.1126/sciadv.aav5532

@article{Choi2019-04strai-48455, title={3D strain-induced superconductivity in La2CuO4+δ using a simple vertically aligned nanocomposite approach}, year={2019}, doi={10.1126/sciadv.aav5532}, number={4}, volume={5}, journal={Science Advances}, author={Choi, Eun-Mi and Di Bernardo, Angelo and Zhu, Bonan and Lu, Ping and Alpern, Hen and Zhang, Kelvin H. L. and Shapira, Tamar and Feighan, John and Sun, Xing and MacManus-Driscoll, Judith L.}, note={Article Number: eaav5532} }

2019-04 MacManus-Driscoll, Judith L. Alpern, Hen eng Zhu, Bonan Lu, Ping Zhang, Kelvin H. L. MacManus-Driscoll, Judith L. 3D strain-induced superconductivity in La<sub>2</sub>CuO<sub>4+δ</sub> using a simple vertically aligned nanocomposite approach Sun, Xing Alpern, Hen Choi, Eun-Mi Sun, Xing Shapira, Tamar 2020-01-31T10:57:21Z Shapira, Tamar 2020-01-31T10:57:21Z Choi, Eun-Mi Di Bernardo, Angelo Zhu, Bonan Di Bernardo, Angelo Lu, Ping Feighan, John A long-term goal for superconductors is to increase the superconducting transition temperature, T<sub>C</sub>. In cuprates, T<sub>C</sub> depends strongly on the out-of-plane Cu-apical oxygen distance and the in-plane Cu-O distance, but there has been little attention paid to tuning them independently. Here, in simply grown, self-assembled, vertically aligned nanocomposite thin films of La<sub>2</sub>CuO<sub>4+δ</sub> + LaCuO<sub>3</sub>, by strongly increasing out-of-plane distances without reducing in-plane distances (three-dimensional strain engineering), we achieve superconductivity up to 50 K in the vertical interface regions, spaced ~50 nm apart. No additional process to supply excess oxygen, e.g., by ozone or high-pressure oxygen annealing, was required, as is normally the case for plain La<sub>2</sub>CuO<sub>4+δ</sub> films. Our proof-of-concept work represents an entirely new approach to increasing TC in cuprates or other superconductors. Attribution 4.0 International Zhang, Kelvin H. L. Feighan, John

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