相关实验视频
Updated: Jul 13, 2026

10:37
Spatial Separation of Molecular Conformers and Clusters
Published on: January 9, 2014
分量带电的准粒子聚集在一起,穿过高电位障碍物
E Comforti1, Y C Chung, M Heiblum
1Braun Center for Submicron Research, Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel.
Nature
|April 5, 2002
概括
射击噪声测量显示,在微量量子霍尔 (FQH) 模式中的准粒子可以单独穿过强大的障碍物. 这挑战了以前关于高潜力的准粒子行为的信念.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子霍尔效应现象 量子霍尔效应现象
- 介面镜物理学的物理
背景情况:
- 射击噪声测量对于在分数量子霍尔 (FQH) 状态下确定准粒子电荷至关重要.
- 以前,人们认为不透明的屏障需要准粒子捆绑 (例如,三个准粒子) 或电子道.
研究的目的:
- 研究e/3类粒子与FQH系统中强大的潜在障碍物相互作用的行为.
- 为了确定准粒子是否单独或团结地穿过高电位障碍物.
主要方法:
- 使用射击噪声测量来探测准粒子道.
- 分析测量电荷对屏障不透明度和准粒子电流稀释的依赖.
- 在分量量子霍尔 (FQH) 样本中进行实验.
主要成果:
- 观察到,在强大的屏障上准粒子聚合取决于准粒子电流的稀释.
- 发现对于非常稀释的电流,准粒子聚合会停止.
- 证明转移的电荷在稀释电流的强反散极限中接近e/3.
结论:
- 带电荷e/3的准粒子可以单独穿过强大的潜在障碍物.
- 测量的表面电荷受准粒子电流稀释的影响.
- 这一发现修订了在分数量子霍尔体制中准粒子运输的理解.
相关概念视频
Electron Behavior
Electrons are negatively charged subatomic particles that are attracted to an orbit around the positively-charged nucleus of an atom. They reside in locations that are associated with energy levels called shells and are further organized into sub-shells and orbitals within each shell.Electrons Orbit the NucleusElectrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus...
Continuous Charge Distributions
Imagine a bucket of water. It contains many molecules, of the order of 1026 molecules. Thus, although it contains discrete elements (molecules) at the microscopic level, macroscopically, it can be considered continuous. Small volume elements of water, infinitesimal compared to the bulk of the bucket's volume, still contain many molecules. Under this framework, quantized matter is approximated as continuous for practical purposes.
The electric charge can also be subjected to an analogical...
The electric charge can also be subjected to an analogical...
Electron Behavior
Electrons are negatively charged subatomic particles attracted to and orbit around the positively-charged nucleus of an atom. They reside in spaces associated with energy levels called shells and are further organized into subshells and orbitals within each shell.
Electrons Orbit the Nucleus
Electrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus have less energy,...
Electrons Orbit the Nucleus
Electrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus have less energy,...
Colloidal precipitates
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
Capillary Electrophoresis: Instrumentation
Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...
The Electrical Double Layer
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...

