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Title: Interfacial-Redox-Induced Tuning of Superconductivity in YBa2Cu3O7-δ

Journal Article · · ACS Applied Materials and Interfaces
ORCiD logo [1];  [2];  [3];  [3];  [4];  [4];  [5];  [6]; ORCiD logo [7];  [1];  [1];  [8];  [9];  [1];  [3]; ORCiD logo [10]
  1. Univ. of California, Davis, CA (United States)
  2. National Inst. of Standards and Technology (NISTI), Gaithersburg, MD (United States); Univ. of Tennessee, Knoxville, TN (United States)
  3. National Inst. of Standards and Technology (NISTI), Gaithersburg, MD (United States)
  4. Univ. Complutense, Madrid (Spain)
  5. Univ. of California, Davis, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  6. Univ. of Tennessee, Knoxville, TN (United States)
  7. Univ. of California, Davis, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  8. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  9. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  10. Univ. of California, Davis, CA (United States); Georgetown Univ., Washington, DC (United States)

Solid-state ionic approaches for modifying ion distributions in getter/oxide heterostructures offer exciting potentials to control material properties. Here, we report a simple, scalable approach allowing for manipulation of the superconducting transition in optimally doped YBa2Cu3O7-δ (YBCO) films via a chemically driven ionic migration mechanism. Using a thin Gd capping layer of up to 20 nm deposited onto 100 nm thick epitaxial YBCO films, oxygen is found to leach from deep within the YBCO. Progressive reduction of the superconducting transition is observed, with complete suppression possible for a sufficiently thick Gd layer. These effects arise from the combined impact of redox-driven electron doping and modification of the YBCO microstructure due to oxygen migration and depletion. Finaly, this work demonstrates an effective step toward total ionic tuning of superconductivity in oxides, an interface-induced effect that goes well into the quasi-bulk regime, opening-up possibilities for electric field manipulation.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
Comunidad de Madrid; Federación Española de Enfermedades Raras (FEDER); Ministry of Economy and Competitiveness (MINECO); National Institute of Standards and Technology (NIST); National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC02-05CH11231; AC52-07NA27344
OSTI ID:
1603595
Report Number(s):
LLNL-JRNL--758244; ark:/13030/qt64p820jt
Journal Information:
ACS Applied Materials and Interfaces, Journal Name: ACS Applied Materials and Interfaces Journal Issue: 4 Vol. 12; ISSN 1944-8244
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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