接口主导的旋转到电荷转换在特拉赫兹发射带结构工程的拓表面状态的波段结构工程
Yun Sun1,2, Fan Zhang3, Jing Li1
1Fert Beijing Institute, MIIT Key Laboratory of Spintronics, School of Integrated Circuit Science and Engineering, Beihang University, Beijing 100191, China.
ACS nano
|May 2, 2025
概括
高效的太赫兹发射器对于未来的技术至关重要. 这项研究通过工程接口和兴奋剂优化了 (Bi,Sb) 2Te3 / Fe异构结构,显著提高了太赫兹发射的旋转到电荷转换.
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:
- 未来的信息技术需要高效的太赫兹 (THz) 发射器,用于通信,传感和量子计算的应用.
- 三维拓绝缘器由于其旋转动量锁定表面状态,提供了潜在的潜力,作为高效的旋转电荷转换器.
- 拓绝缘器的当前THz排放效率落后于其他自旋电子设备.
研究的目的:
- 研究 (Bi1-xSbx) 2Te3/Fe异构结构的自转太赫兹发射特性.
- 探索带结构工程,以提高THz发射器的效率.
- 在基于拓绝缘器的THz发射器中确定影响旋转到充电转换效率的关键因素.
主要方法:
- 高晶质 (Bi1-xSbx) 2Te3/Fe异构结构的制造.
- 通过界面修改 (例如,附加Bi层) 来进行带结构工程.
- 在拓绝缘层中兴奋剂度的系统变化.
主要成果:
- 在电荷中立点没有观察到最强的太赫兹辐射,这与预期相反.
- 界面透明度被确定为影响排放效率的主要因素.
- 附加一个Bi层创建了一个Rashba介导的迪拉克表面状态,增强旋转到充电的转换.
- 使用0.5%和1%Sb的兴奋剂导致强度增强分别为50.3%和44.3%.
结论:
- 接口工程和兴奋剂对于优化拓绝缘体异构结构中的太赫兹发射效率至关重要.
- 该研究为高级THz应用的拓材料的旋转到充电动力学提供了洞察力.
- 结果为开发更高效和更具成本效益的太赫兹发射器铺平了道路.
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