低功率晶体管具有理想的p型欧姆接触 基于VS/WSe 范德瓦尔斯异构结构
Zenglin Cao1, Lin Zhu1, Kailun Yao1
1School of Physics and Wuhan National High Magnetic field center, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
ACS applied materials & interfaces
|April 4, 2024
概括
这项研究表明,VS2/WSe2-vdWHs-FET中的低电阻欧姆接触对于高性能二维 (2D) 场效应晶体管 (FET) 至关重要. 优化的结构实现了低的肖特基障碍,并满足了低功率的要求.
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:
- 二维 (2D) 场效应晶体管 (FET) 需要低电阻的欧米接触器以获得最佳性能.
- 二硫化物 (VS2) 和二化物 (WSe2) 范德瓦尔斯异构结构 (vdWHs) 是下一代电子产品的有希望的材料.
研究的目的:
- 从理论上研究 VS2/WSe2-vdWHs-FET 具有不同门长度 (Lg) 的性能.
- 探索这些设备中的欧米接触与消失的肖特基屏障的形成.
- 评估低功耗 (LP) 应用的潜力.
主要方法:
- 使用 *ab initio* 量子运输模拟.
- 分析了带偏移和金属诱导间隙状态 (MIGS).
- 研究了底层 (UL) 结构对设备性能的影响.
主要成果:
- 获得了非常低的Schottky屏障孔高度 -0.01 eV,表明p型欧米接触.
- 显示了69mV/dec的低下值波动 (SS) 和高开/关电流比 (Ion/Ioff) 超过107.
- 证实,网关长度低至3nm的设备可以满足国际半导体技术路线图 (ITRS) 的低功耗要求,具有受控的底层.
结论:
- 理论发现为开发高性能,低功耗的2D FET提供了途径.
- 优化的VS2/WSe2-vdWHs-FETs具有特定的底层结构,对于实现欧米接触和满足LP目标至关重要.
- 这项研究为未来设计和制造先进的二维电子设备提供了宝贵的见解.
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