Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Magnetic Field due to Moving Charges01:23

Magnetic Field due to Moving Charges

8.6K
A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
8.6K
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

647
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis.
647
Atomic Nuclei: Nuclear Magnetic Moment00:59

Atomic Nuclei: Nuclear Magnetic Moment

1.1K
All atomic nuclei are positively charged. When they have a nonzero spin, they behave like rotating charges. As a consequence of their charge and spin, these nuclei generate a magnetic field (B). This, in turn, gives rise to a magnetic moment (μ), which is randomly oriented in the absence of an external magnetic field. When an external magnetic field (B0) is applied, the magnetic moment vectors can align with the field or against it in 2 + 1 orientations. A hydrogen nucleus, which is just a...
1.1K
Force On A Current Loop In A Magnetic Field01:17

Force On A Current Loop In A Magnetic Field

3.2K
Magnetic forces on wires carrying current are most frequently applied in motors. A DC motor is a device that converts electrical energy into mechanical work. In motors, wire loops are enclosed in a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate. The direction of the current is reversed once the loop's surface area is lined up with the magnetic field, causing a constant torque on the loop. During the process,...
3.2K
Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

929
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of...
929
Magnetic Force On A Current-Carrying Conductor01:25

Magnetic Force On A Current-Carrying Conductor

4.1K
Moving charges experience a force in a magnetic field. Since the magnetic fields produced by moving charges are proportional to the current, a conductor carrying a current creates a magnetic field around it.
Consider a compass placed near a current-carrying wire. The wire experiences a force that aligns the needle of the compass tangentially around the wire. Thus, the current-carrying wire produces concentric circular loops of magnetic field. The magnetic field generated by a wire can be...
4.1K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Gate-controlled electron quantum interference logic.

Nanoscale·2022
Same author

Computational perspective on recent advances in quantum electronics: from electron quantum optics to nanoelectronic devices and systems.

Journal of physics. Condensed matter : an Institute of Physics journal·2022
Same author

Complex Systems in Phase Space.

Entropy (Basel, Switzerland)·2020
Same author

Accelerating Flux Calculations Using Sparse Sampling.

Micromachines·2019
Same author

Simulation of the Impact of Ionized Impurity Scattering on the Total Mobility in Si Nanowire Transistors.

Materials (Basel, Switzerland)·2019
Same author

ReaxFF Reactive Molecular Dynamics Study of Orientation Dependence of Initial Silicon Carbide Oxidation.

The journal of physical chemistry. A·2017
Same journal

Construction and anti-osteoporotic activity evaluation of dual-targeted exosomes derived from bone marrow mesenchymal stem cells.

Nanoscale·2026
Same journal

Nonlinear electrical output enhancement <i>via</i> compositional matching in ZnO nanorod-PVDF/CB-PDMS hybrid piezoelectric-triboelectric nanogenerators.

Nanoscale·2026
Same journal

Dual MXene/COF separator with ion-sieving channels and electrocatalytic surfaces for high-performance and durable Li-S batteries.

Nanoscale·2026
Same journal

Low electronegativity-induced high-entropy engineering of (NiCoFeMnCr)<sub>3</sub>S<sub>4</sub> for an efficient oxygen evolution reaction.

Nanoscale·2026
Same journal

<i>In situ</i> self-catalyzed growth of Ni-N co-doped carbon nanotubes on carbon foam with engineered heterointerfaces for efficient electromagnetic absorption and stealth performance.

Nanoscale·2026
Same journal

Enhancing 3D/2D interfacial integrity between defect-engineered Mn-SrTiO<sub>3</sub> and rGO for high-efficiency bifunctional electrochemical water splitting.

Nanoscale·2026
查看所有相关文章

相关实验视频

Updated: Jun 25, 2025

Scanning SQUID Study of Vortex Manipulation by Local Contact
06:53

Scanning SQUID Study of Vortex Manipulation by Local Contact

Published on: February 1, 2017

6.8K

对于单电子控制的不均磁场.

Mauro Ballicchia1, Clemens Etl1, Mihail Nedjalkov1

  • 1Institute for Microelectronics, TU Wien, Gusshausstrasse 27-29, 1040 Wien, Austria. mauro.ballicchia@tuwien.ac.at.

Nanoscale
|May 20, 2024
PubMed
概括
此摘要是机器生成的。

这项研究引入了一个新的理论框架,用于控制使用非均电磁场的单电子状态. 这些发现揭示了新的电子传输现象,包括蛇轨迹和波袋分裂的边缘状态.

更多相关视频

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

8.1K
Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
07:42

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

2.7K

相关实验视频

Last Updated: Jun 25, 2025

Scanning SQUID Study of Vortex Manipulation by Local Contact
06:53

Scanning SQUID Study of Vortex Manipulation by Local Contact

Published on: February 1, 2017

6.8K
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

8.1K
Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
07:42

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

2.7K

科学领域:

  • 量子光学就是一个量子光学.
  • 电子量子运输是一种量子运输.

背景情况:

  • 控制单个电子状态对于量子信息处理,传感和计量学至关重要.
  • 传统理论依赖于尺度依赖的电位,阻碍了用电磁场直接制定的理论.
  • 之前的工作开发了尺度不变的维格纳方程,但复杂性需要线性场的简单形式.

研究的目的:

  • 概括一个单电子控制的理论框架.
  • 为了整合一般不均的电场和线性不均的磁场.
  • 研究这些场对电子轨迹,干扰和分散的控制能力.

主要方法:

  • 一个测量不变维格纳方程公式的概括.
  • 包括不均的电场和线性不均的磁场.
  • 将一般化方程应用于分析单电子动力学.

主要成果:

  • 通过非均场展示独特的单电子控制机制.
  • 在电子波导中探索蛇的轨迹.
  • 确定波包分裂的可能性,以实现边缘状态.

结论:

  • 一般化表述为研究单电子控制提供了一个强大的工具.
  • 不均场为操纵电子状态提供了新的途径.
  • 这些发现为先进的量子设备和应用铺平了道路.