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Title: Strain-relaxation and critical thickness of epitaxial La1.85Sr0.15CuO4 films

Journal Article · · APL Materials
DOI:https://doi.org/10.1063/1.4937170· OSTI ID:1234342
 [1];  [2];  [3];  [2];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Pusan National Univ., Busan (Korea, Republic of); Univ. of Tennessee, Knoxville, TN (United States)

We report the thickness-dependent strain-relaxation behavior and the associated impacts upon the superconductivity in epitaxial La1.85Sr0.15CuO4 films grown on different substrates, which provide a range of strain. We have found that the critical thickness for the onset of superconductivity in La1.85Sr0.15CuO4 films is associated with the finite thickness effect and epitaxial strain. In particular, thin films with tensile strain greater than ~0.25% revealed no superconductivity. We attribute this phenomenon to the inherent formation of oxygen vacancies that can be minimized via strain relaxation.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1234342
Journal Information:
APL Materials, Vol. 3; ISSN 2166-532X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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Cited By (9)

Emerging magnetism and anomalous Hall effect in iridate–manganite heterostructures journal September 2016
Strain control of oxygen kinetics in the Ruddlesden-Popper oxide La1.85Sr0.15CuO4 journal January 2018
Magnetic signatures of 120 K superconductivity at interfaces in La 2 CuO 4+δ journal January 2020
Electronic and magnetic properties of epitaxial SrRh O 3 films journal June 2017
Magnetic Exchange Fields and Domain Wall Superconductivity at an All-Oxide Superconductor-Ferromagnet Insulator Interface journal August 2018
3D strain-induced superconductivity in La 2 CuO 4+δ using a simple vertically aligned nanocomposite approach journal April 2019
Controlling Oxygen Mobility in Ruddlesden–Popper Oxides journal March 2017
Magnetic Exchange Fields and Domain Wall Superconductivity at an All-Oxide Superconductor-Ferromagnet Insulator Interface text January 2018
Film-thickness-driven superconductor to insulator transition in cuprate superconductors journal February 2020