在MoSe_{2}/hBN/MoSe_{2}异构结构中,电气控制和紧密结合的间层激发子的运输
Lifu Zhang1, Liuxin Gu1, Ruihao Ni1
1Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, USA.
Physical review letters
|June 10, 2024
概括
我们报告了MoSe2/hBN/MoSe2异构结构中动量直接层间激子的形成. 这些激子表现出可调节的特性和远程传输,为量子物理学探索和光电子设备铺平了道路.
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
- 量子光学是一种量子光学.
背景情况:
- 范德瓦尔斯异构结构中的介层激子 (IX) 对斯-爱因斯坦凝聚物和激电集成电路至关重要.
- 对于IXs的基本性质,如结合能和电荷相互作用,尚不完全理解.
研究的目的:
- 为了研究MoSe2/hBN/MoSe2异构结构中动量直介层激子的形成和特性.
- 探索这些IX的电气调度和运输特性.
- 揭示潜在的激子物理学和潜在的应用.
主要方法:
- 高质量的MoSe2/hBN/MoSe2异构结构的制造.
- 应用电场来诱导和控制IXs.
- 光发光 (PL) 光谱用于表征 (线宽,量子产量).
- 空间和极化分辨率的光谱研究.
主要成果:
- 有明亮的PL,高量子产量和狭窄的线宽 (<4 meV) 的动量直线IXs的形成.
- 通过斯塔克效应,电气调节的发射能量 (~180 meV) 通过斯塔克效应.
- 显著的结合能 (~81 meV) 和三离子结合能 (几 meV).
- IXs (>10μm) 的远程运输归因于排斥性相互作用.
- 观测山谷两极分化,局部陷和潜在的黑暗IXs.
结论:
- 在MoSe2/hBN/MoSe2异构结构中,可以形成和电气操作具有狭窄线宽的紧密结合的IXs.
- 这些发现为探索量子多体物理学 (激发凝聚物,超流动性) 开辟了道路.
- 结果使得新型光电子设备的开发成为可能,例如激子和光子路由器.
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