相关实验视频

Updated: Jun 14, 2025

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

Published on: December 5, 2015

在单层MoSi₂N₄晶体管中的电接触

Ying Li¹, Lianqiang Xu², Chen Yang¹

¹State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, P. R. China.

ACS applied materials & interfaces

|September 4, 2024

概括

扫 (Sc) 和 (Ti) 为单层MoSi2N4晶体管形成了理想的欧米接触,使得有效的载体注入成为可能. 这项研究优化了下一代场效应晶体管 (FET) 的电接触.

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:

单层MoSi2N4是下一代晶体管的有前途的二维材料,因为其稳定性,带隙和高载波移动性.
高效的电接触对于优化2D材料基晶体管中载体注入和设备性能至关重要.
了解金属半导体接口对于设计高性能电子设备至关重要.

研究的目的:

系统地研究各种金属电极和单层MoSi2N4.4之间的电接触特性.
确定最佳的金属接触点,以实现MoSi2N4晶体管中高效的载体注入.
探索影响接触行为的因素,包括费米级别固定和带对齐.

主要方法:

使用密度函数理论 (DFT) 结合不平衡格林函数 (NEGF) 方法来模拟量子运输.
分析了典型金属电极和单层MoSi2N4.4之间的垂直和水平接口.
计算了不同的金属-MoSi2N4组合的道障碍,肖特基障碍和费米固定因子.

主要成果:

斯堪迪 (Sc) 和 (Ti) 被确定为最佳金属,形成无道障碍的n型欧米接触.
(In) 形成了n型接触,没有肖特基障碍,但有一个显著的道障碍 (3.11 eV).
铜 (Cu) 和金 (Au) 形成了n型肖特基接触,而 (Pt) 形成了p型接触.
观察到高费米固定因子 (>0.51),显示出与MoSi2N4.4的带间隙有很强的正相关性.

结论:

Sc和Ti是单层MoSi2N4晶体管中接触金属的优秀候选者,促进了高效的电子注入.
该研究为优化基于MoSi2N4的场效应晶体管 (FET) 的电接触提供了关键的见解.
单层MoSi2N4显示出作为先进电子设备的通道材料的巨大潜力.

关键词:

这就是MoSi2N4N4的含量.斯科特基屏障是一个障碍.密度函数理论密度函数理论固定因子的固定因子量子运输模拟量子运输模拟

更多相关视频

A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics

A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics

Published on: August 28, 2018

Using Laser Scanning Microscopy to Determine Electromigration in Molybdenum Disilicide

Using Laser Scanning Microscopy to Determine Electromigration in Molybdenum Disilicide

Published on: May 23, 2025

相关概念视频

Metal-Semiconductor Junctions

Metal-Semiconductor Junctions

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...

Characteristics of MOSFET

Characteristics of MOSFET

Metal-oxide-semiconductor field-effect Transistors, or MOSFETs, play a critical role in electronic circuits. They are primarily utilized for amplifying and switching signals.
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable...

MOSFET

MOSFET

The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
In an n-MOSFET, the structure includes n-type source and drain...

MOSFET: Enhancement Mode

MOSFET: Enhancement Mode

Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...

MOS Capacitor

MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...

MOSFET: Depletion Mode

MOSFET: Depletion Mode

Depletion-mode MOSFETs represent a unique subset of MOSFET technology, functioning fundamentally differently from their enhancement-mode counterparts. Unlike enhancement MOSFETs, which require a positive gate-source voltage (Vgs) to turn on, depletion-mode MOSFETs are inherently conductive and "normally on" devices.
The primary characteristic of depletion-mode MOSFETs is their ability to conduct current between the drain and source terminals without gate bias. This inherent conductivity...