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Oxygen-Valve Formed in Cobaltite-Based Heterostructures by Ionic Liquid and Ferroelectric Dual-Gating
Gu, Youdi; Xu, Kun; Song, Cheng; Zhong, Xiaoyan; Zhang, Hongrui; Mao, Haijun; Saleem, Muhammad Shahrukh; Sun, Jirong; Liu, Wei; Zhang, Zhidong; Pan, Feng; Zhu, Jing
2019-05-29
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume11Issue:21Pages:19584-19595
AbstractManipulation of oxygen vacancies via electric-field-controlled ionic liquid gating has been reported in many model systems within the emergent fields of oxide electronics and iontronics. It is then significant to investigate the oxygen vacancy formation/annihilation and migration across an additional ferroelectric layer with ionic liquid gating. Here, we report that via a combination of ionic liquid and ferroelectric gating, the remote control of oxygen vacancies and magnetic phase transition can be achieved in SrCoO2.5 films capped with an ultrathin ferroelectric BaTiO3 layer at room temperature. The ultrathin BaTiO3 layer acts as an atomic oxygen valve and is semitransparent to oxygen-ion transport due to the competing interaction between vertical electron tunneling and ferroelectric polarization plus surface electrochemical changes in itself, thus resulting in the striking emergence of new mixed-phase SrCoOx. The lateral coexistence of brownmillerite phase SrCoO2.5 and perovskite phase SrCoO3-delta was directly observed by transmission electron microscopy. Besides the fundamental significance of long-range interaction in ionic liquid gating, the ability to control the flow of oxygen ions across the heterointerface by the oxygen valve provides a new approach on the atomic scale for designing multistate memories, sensors, and solid-oxide fuel cells.
Keywordionic liquid gating ferroelectric polarization oxygen vacancies phase transition oxygen valve
Indexed BySCI
Language英语
WOS IDWOS:000470034700076
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81078
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Gu, Youdi,Xu, Kun,Song, Cheng,et al. Oxygen-Valve Formed in Cobaltite-Based Heterostructures by Ionic Liquid and Ferroelectric Dual-Gating[J]. ACS APPLIED MATERIALS & INTERFACES,2019,11(21):19584-19595.
APA Gu, Youdi.,Xu, Kun.,Song, Cheng.,Zhong, Xiaoyan.,Zhang, Hongrui.,...&Zhu, Jing.(2019).Oxygen-Valve Formed in Cobaltite-Based Heterostructures by Ionic Liquid and Ferroelectric Dual-Gating.ACS APPLIED MATERIALS & INTERFACES,11(21),19584-19595.
MLA Gu, Youdi,et al."Oxygen-Valve Formed in Cobaltite-Based Heterostructures by Ionic Liquid and Ferroelectric Dual-Gating".ACS APPLIED MATERIALS & INTERFACES 11.21(2019):19584-19595.
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