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Types Of Superconductors01:28

Types Of Superconductors

959
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
959
Superconductor01:24

Superconductor

1.1K
A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
1.1K
Theory of Metallic Conduction01:17

Theory of Metallic Conduction

1.3K
The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
1.3K
Magnetic Field Due To A Thin Straight Wire01:28

Magnetic Field Due To A Thin Straight Wire

4.8K
Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
4.8K
Ferromagnetism01:31

Ferromagnetism

2.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.4K
Magnetic Field Due to Two Straight Wires01:18

Magnetic 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.
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相关实验视频

Updated: Jun 18, 2025

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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在扭曲的石墨烯多层中超导性的演变.

Min Long1,2, Alejandro Jimeno-Pozo1, Héctor Sainz-Cruz1

  • 1Instituto Madrileño de Estudios Avanzados en Nanociencia, Madrid 28049, Spain.

Proceedings of the National Academy of Sciences of the United States of America
|July 30, 2024
PubMed
概括

莫雷石墨烯系统中的超导性通过电荷波动得到增强. 扭曲双层和螺旋三层显示与扭曲双层石墨烯相比,由于moiré Umklapp过程,具有明显的超导性能.

关键词:
石墨烯的使用方法超导性是一种超导性.扭曲的扭曲的扭曲的扭曲

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Fabricating van der Waals Heterostructures with Precise Rotational Alignment
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科学领域:

  • 凝聚物质物理学 凝聚物质物理学
  • 材料科学 材料科学 材料科学
  • 量子材料是一种量子材料.

背景情况:

  • 莫伊雷石墨烯系统,包括扭曲和未扭曲的堆,表现出超导性.
  • 了解这些复杂的异构结构中驱动超导的机制至关重要.

研究的目的:

  • 分析长距离的电荷波动对扭曲双层石墨烯和螺旋三层的超导性的贡献.
  • 为了将这些发现与扭曲双层石墨烯进行比较.

主要方法:

  • 采用了使用已确定的参数的图形方法.
  • 不同的莫雷石墨烯配置之间的比较分析.

主要成果:

  • 在扭曲双层/螺旋三层和扭曲双层石墨烯之间观察到临界温度和顺序参数的显著差异.
  • 这些趋势与现有的实验观测相一致.

结论:

  • 长距离的电荷波动在莫伊尔石墨烯超导性中起着关键作用.
  • 莫埃尔-乌姆克拉普过程被认为是区分各种莫埃尔石墨烯系统中的超导行为的一个关键因素.