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Metal-Semiconductor Junctions

Metal-Semiconductor Junctions

The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...

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相关实验视频

Updated: Jul 6, 2025

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

通过界面滑动进行边缘对边缘侧向异构结构.

Zhiwei Li¹, Longbin Zhang¹, Songlong Liu¹

¹Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha 410082, China.

|January 5, 2024

概括

研究人员开发了一种新的方法,通过滑动二维材料来创建侧面范德瓦尔斯异构结构 (vdWHs). 这种技术使得边缘接触成为可能,克服了制造这些先进的半导体设备之前的局限性.

关键词:

破裂治愈 - 治愈的方法边缘接触接触边缘接触接口滑动的接口横向异质连接的异质连接

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Last Updated: Jul 6, 2025

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

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Published on: July 5, 2019

Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization

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Published on: July 17, 2015

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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
纳米技术纳米技术

背景情况:

范德瓦尔斯异构结构 (vdWHs) 在二维半导体研究中至关重要.
目前的vdWH主要使用具有很大的重叠的垂直结构.
制造具有边缘接触的横向异构结构是具有挑战性的,因为纳米级的操纵困难.

研究的目的:

展示一种新的接口滑动方法,用于在2D材料中创建边缘到边缘的侧面接触.
克服当前制造横向VDWH的方法的局限性.
探索这种方法对2D和3D薄膜异质连接的潜力.

主要方法:

开发一种通过拉伸垂直VDWHs的接口滑动技术.
使用受控的应变来诱导2D片的横向移动.
使用显微镜和现场电气测量进行表征.

主要成果:

成功地将垂直vdWHs转换为侧向异面连接,与密切的边缘接触.
在制造的横向结构中观察载体道行为.
证明该方法对2D/3D和3D/3D薄膜Schottky连接器的适用性.

结论:

接口滑动方法为制造横向vdWHs提供了一个简单的途径.
这种方法可以精确控制2D材料的边缘接触.
这种技术是多功能性的,并扩展到用3D薄膜创建横向接口.