金属间层对Sb2Te3的自旋电荷转换的影响 基于拓绝缘体的设备
Emanuele Longo1, Matteo Belli2, Claudia Wiemer3
1Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra, Catalonia 08193, Spain.
Nano letters
|April 18, 2025
概括
在拓绝缘体-铁磁体异构结构中用取代黄金,可以防止旋电荷转换. 合金 合金 是一种
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 这就是Spintronics.
背景情况:
- 在拓绝缘体 (TI) 异构结构中的自旋电荷转换 (SCC) 可控制铁磁层磁化.
- 像黄金 (Au) 这样的非磁性中间层可以通过保留TI的拓表面状态 (TSS) 来提高SCC的效率.
研究的目的:
- 研究 (Al) 作为替代黄金 (Au) 的中间层,以提高Sb2Te3/Al/Co(Fe) 异构结构中的SCC效率.
- 阐明材料化学和拓表面状态 (TSS) 在调解SCC中的作用.
主要方法:
- 制造Sb2Te3/Al/Co(Fe) 和Sb2Te3/Au/Co(Fe) 的异构结构.
- 旋转试验来测量SCC的效率.
- 核心水平和价值带光辐射光谱学以分析接口化学和TSS保存.
主要成果:
- 旋转试验表明Sb2Te3/Al/Co异构结构中没有SCC.
- 光发射光谱学显示,Al与Sb和Te形成稳定的化合物,灭TSS.
- 该Sb2Te3/Au接口保留了TSS,与高效的SCC相一致.
结论:
- 间层不适合基于TI的SCC设备,因为化学反应会灭TSS.
- 接口上的材料化学极大地影响了TSS的保存和SCC的效率.
- 在这些设备中,拓表面状态 (TSS) 对于高效的自旋电荷转换至关重要.
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