论文标题
由固体离子连接驱动的电场控制高速公路SRRUO3
Electric-field-controllable high-spin SrRuO3 driven by a solid ionic junction
论文作者
论文摘要
通过使用电场来控制强相关系统中的磁性和旋转结构至关重要，但具有挑战性。在这里，通过在SRRRUO3/SRTIO3界面处的固体离子化学连接来实现高旋转晶格，具有不同的形成能和氧空位的扩散屏障，在半导体异质结构中的电子带对齐的类似物。被困在此界面SRRUO3中的氧气空位重建RU-4D电子结构和轨道占用率，从而增强了磁矩。此外，界面磁相可以通过在固态离子门控装置中的电场矫正氧迁移而可逆地切换，从而为强相关的氧化物中功能的原子设计提供了一种使用固体化学方法的框架。
Controlling magnetism and spin structures in strongly correlated systems by using electric field is of fundamental importance but challenging. Here, a high-spin ruthenate phase is achieved via a solid ionic chemical junction at SrRuO3/SrTiO3 interface with distinct formation energies and diffusion barriers of oxygen vacancies, analogue to electronic band alignment in semiconductor heterojunction. Oxygen vacancies trapped within this interfacial SrRuO3 reconstruct Ru-4d electronic structure and orbital occupancy, leading to an enhanced magnetic moment. Furthermore, an interfacial magnetic phase can be switched reversibly by electric-field-rectifying oxygen migration in a solid-state ionic gating device, providing a framework for atomic design of functionalities in strongly correlated oxides using a way of solid chemistry.
