巨大的和可调节的外平面旋转极化拓抗烯的拓抗烯
Polina M Sheverdyaeva1, Conor Hogan2,3, Gustav Bihlmayer4
1Istituto di Struttura della Materia-CNR (ISM-CNR), Strada Statale 14 km 163.5, 34149 Trieste, Italy.
Nano letters
|July 17, 2023
概括
拓绝缘器表现出独特的自旋极化表面状态. 在这些状态中,与反烯的接口会诱导几乎完全的外平面旋转极化,可以通过电子合来调整旋转电子.
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
- 量子力学就是量子力学.
背景情况:
- 拓绝缘器 (TI) 具有绝缘体,但具有自旋动量锁定的导电表面状态.
- 这些拓表面状态 (TSSs) 通常在散带间隙内表现出平面内旋转极化.
- 在TSS中利用新型自旋纹理对于先进的电子和自旋电子设备至关重要.
研究的目的:
- 为了研究TI/抗二层系统中拓表面状态 (TSSs) 的旋转极化特征.
- 探索由外部刺激引起的自旋两极化的可调性,例如电子兴奋剂.
- 确定该系统在旋转电子应用中的潜力.
主要方法:
- 使用自旋分辨率光辐射光谱学 (SRPES) 来探测TSS的电子结构和自旋偏振.
- 实验测量是在与抗二层接口的拓绝缘器上进行的.
- 进行了能量和动量映射,以分析带分散和旋转纹理.
主要成果:
- TI/抗二层系统的TSS在基质间隙中显示出几乎完全的外平面旋转极化.
- 这种外平面旋转极化与旋转极化表面状态的对称性保护带交叉有关.
- 发现自旋两极化可以通过电子兴奋剂从外平面到内平面进行可逆调节.
结论:
- TI/抗子接口在TSS中促进了一种新的,可调节的外平面旋转极化.
- 这种现象为设计利用巨型外平面旋转偏振的自旋电子设备开辟了新的途径.
- 这些发现突出了范德瓦尔斯异构结构在控制拓材料中自旋特性方面的潜力.
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