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Title: Strain control of oxygen kinetics in the Ruddlesden-Popper oxide La 1.85Sr 0.15CuO 4

Abstract

Oxygen defect control has long been considered an important route to functionalizing complex oxide films. However, the nature of oxygen defects in thin films is often not investigated beyond basic redox chemistry. One of the model examples for oxygen-defect studies is the layered Ruddlesden–Popper phase La 2-xSr x CuO 4-δ (LSCO), in which the superconducting transition temperature is highly sensitive to epitaxial strain. However, previous observations of strain-superconductivity coupling in LSCO thin films were mainly understood in terms of elastic contributions to mechanical buckling, with minimal consideration of kinetic or thermodynamic factors. Here, we report that the oxygen nonstoichiometry commonly reported for strained cuprates is mediated by the strain-modified surface exchange kinetics, rather than reduced thermodynamic oxygen formation energies. Remarkably, tensile-strained LSCO shows nearly an order of magnitude faster oxygen exchange rate than a compressively strained film, providing a strategy for developing high-performance energy materials.

Authors:
 [1];  [2]; ORCiD logo [1];  [3]; ORCiD logo [4]; ORCiD logo [1];  [5]; ORCiD logo [2]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  2. Univ. of Wisconsin, Madison, WI (United States). Dept. of Materials Science and Engineering
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy. Dept. of Materials Science and Engineering
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1422606
Alternate Identifier(s):
OSTI ID: 1460837
Grant/Contract Number:  
AC05-00OR22725; AC02-06CH11357; 1148011; OCI-1053575
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; electronic properties and materials; superconducting properties and materials; surfaces, interfaces and thin films

Citation Formats

Meyer, Tricia L., Jacobs, Ryan, Lee, Dongkyu, Jiang, Lu, Freeland, John W., Sohn, Changhee, Egami, Takeshi, Morgan, Dane, and Lee, Ho Nyung. Strain control of oxygen kinetics in the Ruddlesden-Popper oxide La1.85Sr0.15CuO4. United States: N. p., 2018. Web. doi:10.1038/s41467-017-02568-z.
Meyer, Tricia L., Jacobs, Ryan, Lee, Dongkyu, Jiang, Lu, Freeland, John W., Sohn, Changhee, Egami, Takeshi, Morgan, Dane, & Lee, Ho Nyung. Strain control of oxygen kinetics in the Ruddlesden-Popper oxide La1.85Sr0.15CuO4. United States. doi:10.1038/s41467-017-02568-z.
Meyer, Tricia L., Jacobs, Ryan, Lee, Dongkyu, Jiang, Lu, Freeland, John W., Sohn, Changhee, Egami, Takeshi, Morgan, Dane, and Lee, Ho Nyung. Mon . "Strain control of oxygen kinetics in the Ruddlesden-Popper oxide La1.85Sr0.15CuO4". United States. doi:10.1038/s41467-017-02568-z. https://www.osti.gov/servlets/purl/1422606.
@article{osti_1422606,
title = {Strain control of oxygen kinetics in the Ruddlesden-Popper oxide La1.85Sr0.15CuO4},
author = {Meyer, Tricia L. and Jacobs, Ryan and Lee, Dongkyu and Jiang, Lu and Freeland, John W. and Sohn, Changhee and Egami, Takeshi and Morgan, Dane and Lee, Ho Nyung},
abstractNote = {Oxygen defect control has long been considered an important route to functionalizing complex oxide films. However, the nature of oxygen defects in thin films is often not investigated beyond basic redox chemistry. One of the model examples for oxygen-defect studies is the layered Ruddlesden–Popper phase La2-xSr x CuO4-δ (LSCO), in which the superconducting transition temperature is highly sensitive to epitaxial strain. However, previous observations of strain-superconductivity coupling in LSCO thin films were mainly understood in terms of elastic contributions to mechanical buckling, with minimal consideration of kinetic or thermodynamic factors. Here, we report that the oxygen nonstoichiometry commonly reported for strained cuprates is mediated by the strain-modified surface exchange kinetics, rather than reduced thermodynamic oxygen formation energies. Remarkably, tensile-strained LSCO shows nearly an order of magnitude faster oxygen exchange rate than a compressively strained film, providing a strategy for developing high-performance energy materials.},
doi = {10.1038/s41467-017-02568-z},
journal = {Nature Communications},
number = ,
volume = 9,
place = {United States},
year = {Mon Jan 08 00:00:00 EST 2018},
month = {Mon Jan 08 00:00:00 EST 2018}
}

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