在单层和双层石墨烯插入的MoS2/金属接触器中调整Schottky屏障高度
Xumei Zhao1, Caijuan Xia2, Lianbi Li1
1School of Science, Xi'an Polytechnic University, Xi'an, 710048, Shaanxi, China.
Scientific reports
|September 8, 2024
概括
将石墨烯插入到二硫化 (MoS2) /金属接触器中,可显著降低肖特基屏障高度. 这项研究探讨了石墨烯.
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
- 纳米科学是一个纳米科学.
背景情况:
- 二硫化物 (MoS2) 是纳米电子设备的有希望的二维材料.
- 在MoS2/金属接口上的Schottky屏障通常会限制设备的性能.
- 石墨烯独特的电子特性为界面工程提供了潜在的潜力.
研究的目的:
- 为了研究石墨烯插入对MoS2/金属接触者的电子特性和Schottky屏障高度的影响.
- 了解与石墨烯的电荷转移动态和界面障碍.
- 为改进的基于MoS2的纳米电子提供设计指南.
主要方法:
- 使用密度函数理论 (DFT) 的第一原则计算.
- 模拟使用各种金属 (Mg,Al,In,Cu,Ag,Au,Pd,Ti,Sc) 的MoS2/石墨烯/金属异构结构.
- 分析电子带结构,电荷转移和肖特基屏障高度.
主要成果:
- 石墨烯插入可降低在MoS2/金属接口上的Schottky屏障高度.
- 电荷转移主要发生在石墨烯/金属接口.
- 在石墨烯/MoS2接口的道屏障阻碍了电子注入.
- 对于使用不同金属的单层和双层石墨烯插入物,量化了Schottky屏障高度的具体减少.
结论:
- 石墨烯作为一个有效的接口层,在MoS2/金属接触中调整Schottky屏障.
- 这些发现为优化基于过渡金属二二基的纳米电子设备提供了一条途径.
- 这项研究为设计高性能MoS2纳米电子设备提供了实用见解.
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