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相关概念视频

Schottky Barrier Diode01:27

Schottky Barrier Diode

337
Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...
337
Diode: Forward bias01:20

Diode: Forward bias

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In semiconductor devices, diodes play a crucial role in directing current flow, and its operation is primarily categorized into forward bias and reverse bias. A diode is said to be forward-biased when its p-type region is connected to the positive terminal of a battery and its n-type region is linked to the negative terminal. This configuration reduces the potential barrier within the diode, allowing current to flow easily from the p to the n-type region.
The behavior of a diode in forward bias...
1.0K
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...
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Diode: Reverse bias01:14

Diode: Reverse bias

694
A diode is reverse-biased when the positive terminal of an external voltage source is connected to the n-type material and the negative terminal to the p-type material. This configuration opposes the natural direction of current flow through the diode, effectively increasing the width of the depletion region and the barrier potential. The reverse bias condition produces a minimal leakage current, primarily due to minority charge carriers. This leakage becomes significant when the reverse...
694
Types Of Superconductors01:28

Types Of Superconductors

972
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...
972
Modeling of Diode Reverse Characteristics01:14

Modeling of Diode Reverse Characteristics

256
In electronic circuits, reverse-biased diode configurations are critical for regulating voltage levels. Zener diodes exploit the reverse breakdown phenomenon and exhibit a controlled breakdown at a specific Zener voltage (VZ). They are designed to maintain a constant voltage across their terminals and are commonly used for voltage regulation in circuits.
When a reverse voltage applied to a Zener diode exceeds its breakdown voltage, the diode enters the breakdown region. At this point, the...
256

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Updated: Jun 26, 2025

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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超导二极管效应和干扰模式在kagome CsV3Sb5

Tian Le1,2, Zhiming Pan1,2,3, Zhuokai Xu1,2

  • 1Key Laboratory for Quantum Materials of Zhejiang Province, Department of Physics, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, People's Republic of China.

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|May 15, 2024
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概括

在 (CsV3Sb5) 片中观察到具有边界超电流的动态超导域. 这表明一个时间逆向对称的超导体秩序, 可能使探索奇特的物理学像Majorana零模式.

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科学领域:

  • 凝聚物质物理学
  • 量子材料
  • 拓物质

背景情况:

  • 卡戈姆系统,如AV3Sb5 (A = K,Rb,Cs),由于丧的格子几何,波段拓和电子相关性而存在复杂的量子状态.
  • AV3Sb5化合物表现出多种对称性破坏过渡,包括电荷排序,阴性和超导性,超导性排序的性质尚不清楚.

研究的目的:

  • 调查固有抗氧化物 (CsV3Sb5) 片中的超导性.
  • 探索这个拓式的超导系统中的动态顺序和时间逆向对称性破坏的潜力.

主要方法:

  • 对无磁场超导二极管效应的实验观察.
  • 在外部磁场下的临界电流行为分析,包括干扰模式.
  • 对超导性质的热史和循环效应的研究.

主要成果:

  • 在CsV3Sb5中显示具有边界超导电流的动态超导电域.
  • 对无磁场超导二极管效应的观察,其极性取决于热史.
  • 超导干扰模式与沿域边界周期调节的超电流一致.

结论:

  • 这些发现暗示了CsV3Sb5中的时间逆向对称性破坏的超导顺序.
  • 观察到的现象表明有动态的超导领域和边界超流.
  • 这种系统为探索外来物理提供了一个平台,例如Majorana零模式,在拓性的kagome材料中.