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

Abstract

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.

Authors:
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)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1542145
Report Number(s):
SAND-2019-7283J
Journal ID: ISSN 2375-2548; 676841
Grant/Contract Number:  
AC04-94AL85000; NA0003525; EP/N509620/1; EP/N017242/1; 687/16; 21872116
Resource Type:
Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 5; Journal Issue: 4; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Choi, Eun-Mi, Di Bernardo, Angelo, Zhu, Bonan, Lu, Ping, Alpern, Hen, Zhang, Kelvin H. L., Shapira, Tamar, Feighan, John, Sun, Xing, Robinson, Jason, Paltiel, Yossi, Millo, Oded, Wang, Haiyan, Jia, Quanxi, and MacManus-Driscoll, Judith L. 3D strain-induced superconductivity in La2CuO4+δ using a simple vertically aligned nanocomposite approach. United States: N. p., 2019. Web. doi:10.1126/sciadv.aav5532.
Choi, Eun-Mi, Di Bernardo, Angelo, Zhu, Bonan, Lu, Ping, Alpern, Hen, Zhang, Kelvin H. L., Shapira, Tamar, Feighan, John, Sun, Xing, Robinson, Jason, Paltiel, Yossi, Millo, Oded, Wang, Haiyan, Jia, Quanxi, & MacManus-Driscoll, Judith L. 3D strain-induced superconductivity in La2CuO4+δ using a simple vertically aligned nanocomposite approach. United States. doi:10.1126/sciadv.aav5532.
Choi, Eun-Mi, Di Bernardo, Angelo, Zhu, Bonan, Lu, Ping, Alpern, Hen, Zhang, Kelvin H. L., Shapira, Tamar, Feighan, John, Sun, Xing, Robinson, Jason, Paltiel, Yossi, Millo, Oded, Wang, Haiyan, Jia, Quanxi, and MacManus-Driscoll, Judith L. Fri . "3D strain-induced superconductivity in La2CuO4+δ using a simple vertically aligned nanocomposite approach". United States. doi:10.1126/sciadv.aav5532. https://www.osti.gov/servlets/purl/1542145.
@article{osti_1542145,
title = {3D strain-induced superconductivity in La2CuO4+δ using a simple vertically aligned nanocomposite approach},
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 Robinson, Jason and Paltiel, Yossi and Millo, Oded and Wang, Haiyan and Jia, Quanxi and MacManus-Driscoll, Judith L.},
abstractNote = {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.},
doi = {10.1126/sciadv.aav5532},
journal = {Science Advances},
number = 4,
volume = 5,
place = {United States},
year = {2019},
month = {4}
}

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Figures / Tables:

Fig. 1 Fig. 1: Tc versus Cu-OA distance/hopping range istance for cuprate superconductors and the standard VAN structure. (A) Tc versus Cu-OA distance / hopping range for one-, two-, and three-layer cuprate systems [main data from (20)]. La2CuO4+δ and La2-xSrxCuO4 both have maximum Tc values of 40 K in bulk, as indicatedmore » on the plot by the redpoint. The calculated correlation between Tc and the hopping range (the range where holes can hop in the CuO planes), which is linked to the Cu-OA distance, is shown on the top axis (20). A larger hopping range and a weaker contribution of the dz2 orbital of Cu give more localized conduction (more 2D-like) in the CuO2 layers (9-11,20), and these lead to the higher Tc. The standard VAN structure aimed for in this work is composed of a LaCuO3 film matrix, with La2CuO4+δ nanopillars incorporat­ ed by self-assembled growth, as shown in three-dimensional (3D) (B) and 2D views (C).« less

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.