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

Journal Article · · Science Advances
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [1]; ORCiD logo [4];  [1]; ORCiD logo [5];  [3]; ORCiD logo [4];  [6]; ORCiD logo [1]
  1. Univ. of Cambridge, Cambridge (United Kingdom). Dept. of Materials Science & Metallurgy
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Hebrew Univ. of Jerusalem (Israel). Racah Inst. of Physics and Center for Nanoscience and Nanotechnology
  4. Purdue Univ., West Lafayette, IN (United States). Dept. of Materials Engineering
  5. Hebrew Univ. of Jerusalem (Israel). Dept. of Applied Physics and Center for Nanoscience and Nanotechnology
  6. Univ. at Buffalo, NY (United States). Dept. of Materials Design and Innovation; State Univ. of New York (SUNY), Buffalo, NY (United States)

A long-term goal for superconductors is to increase the superconducting transition temperature,TC. In cuprates,TCdepends 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. Finally, our proof-of-concept work represents an entirely new approach to increasing >TC n cuprates or other superconductors.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
AC04-94AL85000; NA0003525; EP/N509620/1; EP/N017242/1; 687/16; 21872116
OSTI ID:
1542145
Report Number(s):
SAND-2019-7283J; 676841
Journal Information:
Science Advances, Vol. 5, Issue 4; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

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Cited By (5)

Endogenous Nanoparticles Strain Perovskite Host Lattice Providing Oxygen Capacity and Driving Oxygen Exchange and CH 4 Conversion to Syngas journal December 2019
Design of Complex Oxide Interfaces by Oxide Molecular Beam Epitaxy journal October 2019
Magnetic signatures of 120 K superconductivity at interfaces in La 2 CuO 4+δ journal January 2020
Exchange-biased nanocomposite ferromagnetic insulator journal January 2020
Endogenous Nanoparticles Strain Perovskite Host Lattice Providing Oxygen Capacity and Driving Oxygen Exchange and CH 4 Conversion to Syngas journal February 2020

Figures / Tables (4)