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通过自旋 - 肖特基连接,通过自旋 - 肖特基连接在 chiral perovskite 中呈现 chiral 诱导的自旋选择性的空间映射

Minghui Li^1,2, Zhongwei Chen³, Xiting Lang¹

¹Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.

National science review

|September 10, 2025

概括

化化 PeroVskites 显示出强烈的化诱导的自旋选择性 (CISS) 效应. 一种新的凯尔文探针力显微镜方法揭示了影响设备性能的薄膜不均性,为光旋电子应用提供了洞察力.

科学领域:

材料科学材料科学材料科学
凝聚物质物理学凝聚物质物理学
这就是Spintronics.

背景情况:

化化烯矿 (c-HP) 显示出显著的化诱导的自旋选择性 (CISS) 效应.
对CISS的微观理解及其在光旋电子器件中的应用仍在发展.
准确地描述CISS对于建立设计原则至关重要.

研究的目的:

开发一种定量方法来评估c-HP膜中的CISS效应.
为了空间地绘制依赖于度的表面潜力,并了解CISS的不均性.
为了研究薄膜特性,自旋-肖特基结形成和自旋两极化之间的关系.

主要方法:

使用凯尔文探针力显微镜 (KPFM) 来测量表面接触电位差异.
量化评估和空间映射了依赖于度的潜力.
分析了薄膜前体度和质量对CISS和旋转放松的影响.

主要成果:

开发了一种KPFM方法,通过绘制自旋-肖特基结位潜力来定量评估CISS.
在c-HP膜内发现了CISS反应的不均性,低CISS区域影响了宏观性能.
观察到,更高的前体度增加了薄膜厚度和载体度,导致更大的屏障高度,但也增加了由于薄膜缺陷的旋转放松.

结论:

KPFM提供了一种可行的方法,用于在c-HP中对CISS进行定量和空间解析的表征.
片的不均性是影响宏观CISS性能的关键因素,需要优化.
平衡薄膜质量和所需的电气特性对于最大限度地提高基于c-HP的光旋电子设备中的旋转极化至关重要.

关键词:

凯尔文探针强力显微镜合化物洛夫斯基特 (perovskite) 是一种合化物.性诱导的旋转选择性在同质性方面,不均.旋转 - 斯科特基交叉点的交叉点

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