一个石墨烯/Janus B2P6异构结构,通过层间距离和电场,具有可控制的肖特基屏障
Tian Xie1, Xinguo Ma1,2, Youyou Guo1
1School of Science, Hubei University of Technology, Wuhan 430068, China. maxg@hbut.edu.cn.
Physical chemistry chemical physics : PCCP
|November 13, 2023
概括
研究人员探索了石墨烯/B2P6异构结构中的肖特基屏障形成. 调整层间距离和电场可以控制Schottky屏障高度,为先进的Schottky场效应晶体管铺平了道路.
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
- 半导体设备物理 半导体设备物理
背景情况:
- 降低金属半导体接口上的Schottky屏障对于场效应晶体管 (FET) 的性能至关重要.
- 控制Schottky屏障高度是半导体设备工程中的一个持续的挑战.
研究的目的:
- 为了研究石墨烯/B2P6异构结构中斯科特基屏障形成的机制.
- 探索层间距离和外部电场对肖特基屏障特征的影响.
- 确定下一代电子设备中的潜在应用.
主要方法:
- 利用第一原理计算来模拟和分析石墨烯/B2P6异构结构的电子特性.
- 研究了不同层间距对施托基屏障形成的影响.
- 沿 Z 方向应用外部电场来调节 Schottky 屏障的高度和接触类型.
主要成果:
- 由于B2P6.6.1的垂直不对称结构,在石墨烯/B2P6 ((001) 接口上观察到的欧姆接触.
- 在石墨烯/B2P6 (001) 接口上形成的,具有0.51 eV的屏障高度的n型肖特基接触.
- 可调节的Schottky屏障高度和接触类型,通过调整层间距和应用电场来实现.
- 在0.05V/年电场下,在石墨烯/B2P6(001) 异构中获得了4.65 × 10^13cm^-2的高载体度.
- 在接口上的电荷再分配被确定为能量带结构变化的原因.
结论:
- 石墨烯/B2P6异构结构表现出可调节的舒特基屏障特性.
- 能够控制Schottky屏障高度和载体度的能力使这些异构结构成为先进FET开发的前景.
- GR/B2P6异构结构是开发下一代Schottky场效应晶体管的关键候选者.
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