Study of the resistive switching properties of YBa2Cu3O7−x/Nb:SrTiO3 heterostructures

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-01-16 DOI:10.1016/j.mseb.2025.118001

Jiqiang Jia , Jingran Li , XiaoPeng Liu , Yoshifumi Oshima , Li Lei

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引用次数: 0

Abstract

Metal/Nb:SrTiO₃ (NSTO) heterostructures exhibit strong resistive switching (RS) effects. However, structural mismatches hinder the formation of a stable, low-defect interface, affecting their RS performance. YBa₂Cu₃O_7−x (YBCO) with an excellent electrical conductivity, high work function, and similar crystal structure to NSTO, can form a high-quality barrier interface with NSTO. In this study, YBCO films were deposited on NSTO using pulsed laser deposition. The RS characteristics and photovoltaic effect of the YBCO/NSTO structure were thoroughly investigated. The current–voltage curves reveal that this structure exhibits two different bipolar RS effects at different voltages. Electron energy loss spectroscopy measurements indicate that the oxygen vacancies in both YBCO and NSTO can migrate and redistribute under an external electric field, resulting in two changes in the interface barrier height, which induce two distinct RS effects. Under ultraviolet light, the first RS effect occurs at a slightly lower voltage than in the dark, while the second RS effect occurs at a slightly higher voltage.

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.