相关实验视频

Updated: Aug 14, 2026

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Published on: July 24, 2015

通过纳米红外成像揭示了石墨烯中电流驱动的不平衡电动力学

Y Dong^1,2, Z Sun³, I Y Phinney^4,5

¹Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, USA. yd2400@columbia.edu.

Nature communications

|April 24, 2025

概括

石墨烯中的电子表现出像切伦科夫和施温格现象这样的高能物理效应. 这些导致新的光电流,在纳米级光物质相互作用中扩展光电效应.

科学领域:

凝聚物质物理学凝聚物质物理学
纳米科学是一个纳米科学.
高能物理类型的类似物.

背景情况:

低维物质中的电子被电场带出平衡,显示出类似于高能物理学的效应.
石墨烯是一种二维材料,为研究这些现象提供了一个平台.

研究的目的:

为了证明切伦科夫和施温格在石墨烯中的效应.
研究它们对纳米级光物质相互作用和光电流产生的影响.

主要方法:

使用纳米红外成像.
在电场下研究化和中性电荷石墨烯的电子动态.

主要成果:

观察到合石墨烯中声子的切伦科夫发射,诱导非对称的等离子体阻尼和光电流.
在电荷中性石墨烯中观察到施温格效应,从红外光子产生光电流.
证明了与现有的光电转换机制不同的新型光电流.

结论:

石墨烯表现出切伦科夫和施温格效应,具有独特的光电流生成.
这些发现扩大了对固态设备光电效应的理解.
提供了对石墨烯电流驱动的不平衡电动力学的见解.

更多相关视频

Using Graphene Liquid Cell Transmission Electron Microscopy to Study in Situ Nanocrystal Etching

Using Graphene Liquid Cell Transmission Electron Microscopy to Study in Situ Nanocrystal Etching

Published on: May 17, 2018

Graphene Enclosure of Chemically Fixed Mammalian Cells for Liquid-Phase Electron Microscopy

Graphene Enclosure of Chemically Fixed Mammalian Cells for Liquid-Phase Electron Microscopy

Published on: September 21, 2020

相关概念视频

Induced Electric Fields

Induced Electric Fields

The fact that emfs are induced in circuits implies that work is being done on the conduction electrons in the wires. What can possibly be the source of this work? We know that it’s neither a battery nor a magnetic field, as a battery does not have to be present in a circuit where current is induced, and magnetic fields never do any work on moving charges. The source of the work is in fact an electric field that is induced in the wires. For example, if a stationary conductor is placed in a...