通过电子插入设计无障碍的金属/MoS接触
Mohammad Rafiee Diznab1, Adrian F Rumson2, Jesse Maassen1
1Department of Physics and Atmospheric Science, Dalhousie University, 6310 Coburg Road, Halifax, Nova Scotia, B3H 4R2, Canada. jmaassen@dal.ca.
Physical chemistry chemical physics : PCCP
|May 2, 2024
概括
研究人员建议使用性土亚平尼克电子来为过渡金属二化物 (TMDC) 制造低电阻金属接触物,如MoS2. 在纳米设备中,Ca2N显示为实现高效的欧姆接触的前景.
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:
- 过渡金属二甲基化物 (TMDCs),如MoS2,对电子有希望,但由于高阻力金属接触而受到性能限制.
- 在TMDC - 金属接口的费米级定针和道障碍妨碍了纳米设备的高效电荷传输.
研究的目的:
- 为了研究土亚平尼克提德电子 ([M2X]+e-, M = Ca, Sr, Ba; X = N, P, As, Sb) 作为界面层的潜力,以克服TMDC中的接触电阻问题.
- 通过使用电子介层,确定用于金属 (Au,Cu) 和MoS2之间的低电阻欧米接触的最佳材料组合.
主要方法:
- 密度函数理论 (DFT) 的计算被用来建模金属/电子/MoS2异质连接.
- 分析包括电荷转移的计算,带结构和静电潜力,以评估接触特性.
- 研究了与Au和Cu金属和MoS2.2接口的所有稳定的M2X电子.
主要成果:
- 电子单层有效地向MoS2捐赠表面电荷,降低其导电带边缘并减轻Schottky和道障碍.
- 在电荷捐赠,电子表面电荷和工作功能之间建立了线性相关性.
- 由于其显著的表面电荷密度,Ca2N显示了促进欧米接触的最高潜力.
结论:
- 土亚平尼克提德电子为TMDCs设计低电阻欧姆接触提供了可行的策略.
- 已确定Ca2N电子是改善基于MoS2的电子设备性能的一个特别有前途的候选者.
- 这种方法解决了2D材料在先进电子技术中的应用中的关键瓶.
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