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Solid-State Electrochemical Switch of Superconductor–Metal–Insulators

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Title: Solid-State Electrochemical Switch of Superconductor–Metal–Insulators
Authors: Zhang, Xi Browse this author
Kim, Gowoon Browse this author
Yang, Qian Browse this author
Wei, Jiake Browse this author
Feng, Bin Browse this author
Ikuhara, Yuichi Browse this author
Ohta, Hiromichi Browse this author →KAKEN DB
Keywords: YBa2Cu3O7-delta
superconductor-metal-insulator transition
oxygen deficiency
electrochemical redox reaction
yttria-stabilized zirconia
Issue Date: 17-Nov-2021
Publisher: American Chemical Society
Journal Title: ACS applied materials & interfaces
Volume: 13
Issue: 45
Start Page: 54204
End Page: 54209
Publisher DOI: 10.1021/acsami.1c17014
Abstract: Controlling the oxygen content can manipulate the electrical conductivity of transition metal oxides (TMOs). Although the superconductor-metal-insulator transition is useful for functional devices, an electrical path must be developed to manipulate the oxygen deficiency (delta) while maintaining the solid state. YBa2Cu3O7-delta (YBCO, 0 <= delta <= 1) is a high transition temperature (T-c) TMO that can be modulated from a superconductor (T-c approximate to 92 K when delta = 0) to an insulator (delta approximate to 1). Here, we show a simple and efficient way to manipulate delta in YBCO films using a solid-state electrochemical redox treatment. Applying a negative voltage injects oxide ions to the YBCO films, increasing T-c. Employing a positive voltage suppresses the superconducting transition and modulates the electrical conductivity. The present results demonstrate that the superconductor-metal-insulator transition of YBCO is modulated electrochemically in the solid state, opening possibilities of superconducting oxide-based device applications.
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © 2021 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Type: article (author version)
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 太田 裕道

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