在平面的霍尔设置中以倾斜的韦尔/多韦尔半金属的方向依赖导电性
Rahul Ghosh1, Ipsita Mandal1,2
1Department of Physics, Shiv Nadar Institution of Eminence (SNIoE), Gautam Buddha Nagar, Uttar Pradesh 201314, India.
概括
我们计算了韦尔半金属的磁电导率,发现了独特的拓效应. 这些效应在磁场强度上是线性的,主导导率,并改变响应周期和信号.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 拓学材料科学科学 拓学材料科学
背景情况:
- 韦尔半金属 (WSM) 和多韦尔半金属 (mWSM) 由于其带结构拓,具有独特的电子特性.
- 材料中的磁电效应对于先进的电子应用至关重要.
研究的目的:
- 在各种电磁场方向下计算倾斜的WSM和mWSM中的磁电导电张量.
- 调查非德鲁德导电性贡献的起源和特征.
主要方法:
- 磁电导电张数的理论计算.
- 分析平面大厅配置与倾斜的WSMs/mWSMs的响应.
- 考虑电磁场的所有相对方向和倾斜方向.
主要成果:
- 在倾斜的WSM/mWSM中发现了由贝里曲率引起的导电性的线性-in-deviceB条数.
- 这些拓术语主宰了现实的参数制度,并且独立于B的D^2术语.
- 观察到响应周期 (π到2π) 和信号的变化,取决于电场和磁场之间的角度.
结论:
- 倾斜的存在对于在特定配置中观察线性-in-wideband磁电效应至关重要.
- 这些拓效应为识别WSM/mWSM属性提供了独特的特征.
- 这些发现为拓半金属的基本运输特性提供了洞察力.
相关概念视频
01:30The Hall Effect
2.4K
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.
2.4K
01:16Electric Field of Parallel Conducting Plates
967
Gauss' law relates the electric flux through a closed surface to the net charge enclosed by that surface. Gauss's law can be applied to find the electric field and the charge enclosed in a region depending on its charge distribution.
Consider a cross-section of a thin, infinite conducting plate having a positive charge. For such a large thin plate, as the thickness of the plate tends to zero, the positive charges lie on the plate's two large faces. Without an external electric...
Consider a cross-section of a thin, infinite conducting plate having a positive charge. For such a large thin plate, as the thickness of the plate tends to zero, the positive charges lie on the plate's two large faces. Without an external electric...
967
01:18Magnetic Field Due to Two Straight Wires
2.5K
Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
2.5K
01:22Magnetic Force On Current-Carrying Wires: Example
1.5K
In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.
1.5K
01:13Electrical Conductivity
1.1K
In perfect conductors, the electric field inside is always zero due to the abundance of free electrons, which nullify any field by flowing. As a result, any residual charge resides on the surface.
In a practical conductor, an applied electric field may be sustained, causing a flow of electrons, which produce a current. The differential form of the current, the current density, is related to the electric field.
More generally, it is related to the force per unit charge, which involves the...
In a practical conductor, an applied electric field may be sustained, causing a flow of electrons, which produce a current. The differential form of the current, the current density, is related to the electric field.
More generally, it is related to the force per unit charge, which involves the...
1.1K
01:26Electric Field at the Surface of a Conductor
4.7K
Consider a conductor in electrostatic equilibrium. The net electric field inside a conductor vanishes, and extra charges on the conductor reside on its outer surface, regardless of where they originate.
In the 19th century, Michael Faraday conducted the famous ice pail experiment to prove that the charges always reside on the surface of a conductor. The experimental set-up consists of a conducting uncharged container mounted on an insulating stand. The outer surface of the container is...
In the 19th century, Michael Faraday conducted the famous ice pail experiment to prove that the charges always reside on the surface of a conductor. The experimental set-up consists of a conducting uncharged container mounted on an insulating stand. The outer surface of the container is...
4.7K