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

• DOI: 10.1021/acsami.9b18820
• Publication Date: 2019-12-27T17:52:57Z
• Authors: Peyton D. Murray; Dustin A. Gilbert; Alexander J. Grutter; Brian J. Kirby; David Hernández-M...; Maria Varela; Zachary E. Brubaker; W. L. N. C. Liyanage; Rajesh V. Chopdekar; Valentin Taufour; Rena J. Zieve; Jason R. Jeffries; Elke Arenholz; Yayoi Takamura; Julie A. Borchers; Kai Liu
• Keywords: Getter

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 total of the superconducting transition optimally doped YBa$_{2}$Cu$_{3}$O$_{7-{\delta}}$ (YBCO) films via chemically-driven migration mechanism. Using thin Gd capping layer up 20 nm deposited onto 100 thick epitaxial YBCO films, oxygen is found leach from deep within YBCO. Progressive reduction observed, with complete suppression possible sufficiently layer. These effects arise combined impact redox-driven electron doping and modification microstructure due depletion. This work demonstrates an effective superconductivity oxides, interface induced effect that goes well into quasi-bulk regime, opening possibilities electric field manipulation.