open access

https://hdl.handle.net/2115/87258

Solid-State Electrochemical Switch of Superconductor–Metal–Insulators

英語

yttria-stabilized zirconia

2021-11-17

American Chemical Society

ACS applied materials & interfaces

13(45)

54204-54209

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.

学術雑誌論文

Accepted Manuscript

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 https://pubs.acs.org/articlesonrequest/AOR-PRAGDVAUNK2B4RR5DGMQ.

1944-8244