在MoSe2-WSe2侧向异构结构中电控激子,电荷转移诱导的三子和窄带发射器
Baisali Kundu1, Priyanka Mondal1,2, David Tebbe2
1Materials Science Centre, Indian Institute of Technology, Kharagpur 721302, India.
Nano letters
|November 11, 2024
概括
研究人员精确地控制激子及其复合体在2D异构结构使用电调. 这一进步是开发下一代光子学和电子学的二维量子设备的关键.
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
- 量子电子学 量子电子学
背景情况:
- 控制激子和它们在二维过渡金属二二原体异构结构中的运输对于芯片上的光子学和电子学至关重要.
- 单层MoSe2-WSe2横向异构结构 (LHS) 为研究激子动态提供了一个平台.
研究的目的:
- 研究MoSe2-WSe2 LHSs中受控生成和操纵激子及其复合体.
- 为了演示激子复合体的电调和它们在接口上的传输.
主要方法:
- 使用了场效应晶体管几何学,用石墨烯作为后门和边缘接触.
- 在4K进行光发光和光电流映射.
- 进行密度函数理论计算.
主要成果:
- 实现了刺激子复合体的精确电调和它们的界面传输.
- 由于电学操纵和激子-三子转换,观察到激子和三子密度的空间变化.
- 通过载体注入和电气偏移证明控制的窄带排放.
- DFT计算显示了侧面接口的显著带调整.
结论:
- 这项工作推进了LHS中的激子操纵.
- 这些发现显示出开发下一代二维量子设备的前景.
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