在MoS2单层中非线性异常霍尔效应的应变调整
Yuebei Xiong1, Zhirui Gong1, Hao Jin2
1Institute of Quantum Precision Measurement, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, People's Republic of China.
概括
单轴应变破坏了MoS2单层中的对称性,使得可调节的非线性异常霍尔效应 (AHE) 成为可能. 这种压力诱导的效应类似于光学双折射,为电子设备提供了新的可能性.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学是一种材料科学.
- 纳米科学是一个纳米科学.
背景情况:
- 线性异常霍尔效应 (AHE) 通常在MoS2单层中消失,这是由于时间逆向对称.
- 破坏C3v对称性对于在这样的系统中观察AHE至关重要.
研究的目的:
- 研究单轴应变在MoS2单层中破坏C3v对称性的作用.
- 探索由此产生的非线性AHE及其可调性.
- 分析非线性霍尔角与光学双折射之间的关系.
主要方法:
- 在应力MoS2单层中对电子特性进行理论研究.
- 在单轴应变下对贝里曲率双极 (BCD) 的分析.
- 与光学双折射进行非线性霍尔效应现象的比较.
主要成果:
- 单轴应变破坏了C3v对称性,导致非零的贝里曲率双极 (BCD).
- AHE的大小和非线性霍尔角可以通过应变调整.
- 非线性霍尔角表现出类似于光学双折射的现象,包括虚构的折射率比.
结论:
- 在MoS2单层中诱导应变的BCD可以实现可调节的非线性AHE.
- 观察到的非线性霍尔效应与光学双折射具有相似之处,这是由于BCD的伪向性.
- 研究结果表明,使用2D材料与BCD进行应变控制的电子设备具有潜力.
相关概念视频
The Hall Effect
5.2K
Edwin H. Hall, in the year 1879, devised an experiment that could be used to identify the polarity of the predominant charge carriers in a conducting material. From a historical perspective, this experiment was the first to demonstrate that the charge carriers in most metals are negative.
5.2K
Biasing of Metal-Semiconductor Junctions
907
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...
907
MOSFET: Enhancement Mode
1.1K
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...
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...
1.1K
Debye–Huckel–Onsager Conductance Equation
291
The Debye-Hückel-Onsager equation is a cornerstone of physical chemistry, providing a method to determine the molar conductance (Λm) and molar conductance at infinite dilution (Λ°m) for uni-univalent electrolytes.Uni-univalent electrolytes are electrolytes that dissociate in solution to produce one cation with a +1 charge and one anion with a –1 charge per formula unit.This equation addresses two crucial phenomena: the asymmetry effect and the electrophoretic effect.
291


