半导体
纳米技术
接触电阻
材料科学
过渡金属
范德瓦尔斯力
工程物理
电接点
晶体管
钥匙(锁)
光电子学
计算机科学
物理
电气工程
化学
工程类
量子力学
生物化学
图层(电子)
电压
分子
催化作用
计算机安全
作者
Yan Wang,Manish Chhowalla
标识
DOI:10.1038/s42254-021-00389-0
摘要
2D semiconductors, particularly transition metal dichalcogenides (TMDs), have emerged as highly promising for new electronic technologies. However, a key challenge in fabricating devices out of 2D semiconductors is the need for ultra-clean contacts with resistances approaching the quantum limit. The lack of high-quality, low-contact-resistance P-type and N-type contacts on 2D TMDs has limited progress towards the next generation of low-power devices, such as the tunnel field-effect transistors. In this Expert Recommendation, we summarize strategies and provide guidance for making clean van der Waals contacts on monolayered TMD semiconductors. We also discuss the physics of contacts in 2D semiconductors and prospects for achieving quantum conductance. A key challenge in fabricating devices out of 2D materials is in making good electrical contact. This Expert Recommendation discusses the physics of electrical contacts and provides tips on improving contact quality.
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