2D Janus MoSSe/金属连接点的接触工程
Yu Shu1, Ting Li1, Naihua Miao2
1Multiscale Computational Materials Facility, College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, P. R. China. bssa@fzu.edu.cn.
Nanoscale horizons
|November 29, 2023
概括
2D材料中的高斯科特基障碍阻碍了电子设备. 这项研究使用Janus MoSSe和2D金属展示了可控制的欧米接触,使先进电子产品能够更好地注入和运输载体.
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) 材料为原子厚度的设备提供独特的电子特性.
- 金属二维半导体接口的高斯科特基障碍限制了载体注入和运输效率,阻碍了实际应用.
研究的目的:
- 研究基于Janus MoSSe的异构结构中可控减少或消除Schottky障碍的方法.
- 探索Janus MoSSe与各种二维范德瓦尔斯金属之间的欧姆或准欧姆接触的形成.
主要方法:
- 密度函数理论 (DFT) 的计算.
- 机器学习 (ML) 建模,特别是确定独立性选和分散操作员方法.
- 对带对齐,接口双极和费米级定针效应的分析.
主要成果:
- 在MoSSe/2D金属异构结构中实现了从Schottky过渡到欧米/准欧米接触.
- 确定了接口二极体和费米级定位作为偏离肖特基-莫特极限的关键因素.
- 证明了MoSSe厚度和双轴应变是接触工程的有效调参数.
结论:
- 可控制的欧姆接触可以在基于Janus MoSSe的金属半导体连接 (MSJ) 中实现.
- 一个通用描述符 (WM3/exp(Dint) 已被开发用于预测舒特基屏障高度.
- 为设计使用Janus MoSSe半导体的高性能电子设备提供理论指导.
相关概念视频
Metal-Semiconductor Junctions
353
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
353
Structural Joints: Fibrous Joints
2.0K
Fibrous joints are a type of joint where the bones are connected by fibrous connective tissue. These joints provide stability and minimal to no movement between the articulating bones. There are three types of fibrous joints.
Suture
All the bones of the skull, except for the mandible, are joined to each other by a fibrous joint called a suture. The fibrous connective tissue found at a suture strongly unites the adjacent skull bones and thus helps to protect the brain and form the face. In...
Suture
All the bones of the skull, except for the mandible, are joined to each other by a fibrous joint called a suture. The fibrous connective tissue found at a suture strongly unites the adjacent skull bones and thus helps to protect the brain and form the face. In...
2.0K
Biasing of Metal-Semiconductor Junctions
260
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
260
Design Example: Joints in Concrete Pavements
186
Concrete pavement joints are essential for maintaining the structural integrity and longevity of pavement by controlling where and how the pavement cracks. These joints can be categorized based on their functions, such as contraction or control joints, construction joints, isolation joints, and expansion joints.
Contraction joints are typically formed by sawing a groove into the concrete shortly after it has hardened. This creates a weakened vertical plane, deliberately encouraging cracking at...
Contraction joints are typically formed by sawing a groove into the concrete shortly after it has hardened. This creates a weakened vertical plane, deliberately encouraging cracking at...
186
Structural Joints: Synovial Joints
3.6K
Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...
3.6K
Method of Joints: Problem Solving I
1.1K
The method of joints is a commonly used technique to analyze the forces in structural trusses. The method is based on the principle of equilibrium, which assumes that the truss members are connected by frictionless pins. The forces at each joint can be determined by considering the equilibrium of the forces acting on that joint. Consider a truss structure with two forces of 20 N and 10 N acting at joints C and D, respectively. The method of joints can be used to determine the forces FCB, FDC,...
1.1K


