TY - JOUR
T1 - 3D strain-induced superconductivity in La2CuO4+δ using a simple vertically aligned nanocomposite approach
AU - Choi, Eun Mi
AU - Di Bernardo, Angelo
AU - Zhu, Bonan
AU - Lu, Ping
AU - Alpern, Hen
AU - Zhang, Kelvin H.L.
AU - Shapira, Tamar
AU - Feighan, John
AU - Sun, Xing
AU - Robinson, Jason
AU - Paltiel, Yossi
AU - Millo, Oded
AU - Wang, Haiyan
AU - Jia, Quanxi
AU - MacManus-Driscoll, Judith L.
N1 - Publisher Copyright:
© 2019 The Authors.
PY - 2019
Y1 - 2019
N2 - A long-term goal for superconductors is to increase the superconducting transition temperature, TC. In cuprates, TC 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 La2CuO4+δ + LaCuO3, 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 La2CuO4+δ films. Our proof-of-concept work represents an entirely new approach to increasing TC in cuprates or other superconductors.
AB - A long-term goal for superconductors is to increase the superconducting transition temperature, TC. In cuprates, TC 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 La2CuO4+δ + LaCuO3, 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 La2CuO4+δ films. Our proof-of-concept work represents an entirely new approach to increasing TC in cuprates or other superconductors.
UR - http://www.scopus.com/inward/record.url?scp=85065447637&partnerID=8YFLogxK
U2 - 10.1126/sciadv.aav5532
DO - 10.1126/sciadv.aav5532
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C2 - 31032414
AN - SCOPUS:85065447637
SN - 2375-2548
VL - 5
JO - Science advances
JF - Science advances
IS - 4
M1 - eaav5532
ER -