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基于2D CrI₃/hBN/WSe₂异构结构的自旋极化发光二极管的电转换

Jianchen Dang¹, Tongyao Wu¹, Shaohua Yan^2,3

¹Department of Physics, University of Florida, Gainesville, FL, USA.

Nature communications

|August 9, 2024

概括

这项研究介绍了一种新型的旋转LED,使用原子薄材料进行高效的旋转到光子转换. 该设备允许对光极化进行电气控制,从而实现了旋转电子学中的新应用.

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
纳米技术纳米技术

背景情况:

旋转极化发光二极管 (旋转LED) 对于将电子旋转信息转换为光子循环极化至关重要.
传统的旋转LED需要外部磁场,这限制了它们的操作灵活性.
开发用于旋转LED电气控制的方法对于实际应用至关重要.

研究的目的:

为了演示一个原子薄的旋转LED,具有电调循环极化.
探索使用范德瓦尔斯异构结构用于自旋电子设备.
建立一个平台,供纳米级旋转LED按需运行.

主要方法:

制造一个异构结构装置,包括单层WSe2,几层抗铁磁CRI3和hBN道障碍.
利用CrI3和hBN层在注入载体上的自旋偏振效应.
在WSe2中利用谷光学选择规则用于电光发光.
应用静电场来调整 CrI3 的磁化和控制循环极化.

主要成果:

旋转LED在其电光发光中表现出高度的圆极化,与CRI3.3的磁性状态直接相关.
实现了电流发光循环偏振的高效电调,包括信号反转.
该装置证明了CRI3磁化的电调性.

结论:

开发的原子薄的旋转LED为按需操作提供了一个有前途的平台.
展示了光螺旋的电控,为先进的设备应用铺平了道路.
这项工作突出了范德瓦尔斯异构结构在自旋电子学和光电子学中的潜力.

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