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

Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

903
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
903
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

554
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
554
Semiconductors01:22

Semiconductors

1.4K
There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
1.4K
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

1.6K
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
1.6K
Fermi Level Dynamics01:12

Fermi Level Dynamics

649
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
649
NMR Spectroscopy: Spin–Spin Coupling01:08

NMR Spectroscopy: Spin–Spin Coupling

3.0K
The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved...
3.0K

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

Probing Moiré Excitons in MoSe<sub>2</sub>/WSe<sub>2</sub> Heterobilayers by Combined Micro-photoluminescence and Lateral Force Microscopy.

Nano letters·2026
Same author

Atrial mass causing asymptomatic bradycardia: an unusual presentation of cardiac lymphoma.

European heart journal. Case reports·2026
Same author

Excitonic spin torque in a magnetic semiconductor.

Nature materials·2026
Same author

Imaging the flat bands of magic-angle graphene reshaped by interactions.

Nature·2026
Same author

Bridging Precision and Scalability in Van der Waals Assembly Engineering via Lens-Enhanced Optical Transfer.

Small methods·2026
Same author

Revealing Electron-Electron Interactions in Graphene at Room Temperature with a Quantum Twisting Microscope.

Nano letters·2026

相关实验视频

Updated: Jan 16, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

10.2K

对二维半导体缺陷的磁性近距离合.

Muhammad Hassan Shaikh1, Matthew P Whalen2, Dai Q Ho3,4

  • 1Department of Physics, University of Delaware, Newark, Delaware 19716, United States.

ACS nano
|October 4, 2025
PubMed
概括

研究人员在二维 (2D) 抗铁磁 (AFM) 硫酸 (CrPS4) 中检测到Néel向量,使用化 (WSe2) 的局部缺陷. 这种光学方法使得AFM磁态的特征能够用于先进的计算.

关键词:
CrPS4CrPS4CrPS4CrPS4CrPS4CrPS4CrPS4CrPS4CrPS4CrPS4CrPS4Cr这就是WSe2Se2.半导体中的缺陷.磁性近距离效应的影响旋转极化的电荷转移转移是自旋极化的.这是一种二维磁铁.类型II频段对齐器

更多相关视频

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
15:58

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

6.1K
Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
11:14

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope

Published on: May 28, 2016

14.3K

相关实验视频

Last Updated: Jan 16, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

10.2K
Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
15:58

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

6.1K
Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
11:14

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope

Published on: May 28, 2016

14.3K

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
  • 纳米技术 纳米技术

背景情况:

  • 二维 (2D) 反铁磁 (AFM) 材料由于其旋转动态,为先进的电子设备提供了潜力.
  • 硫酸 (CrPS4) 是一种稳定的2D A型AFM材料,具有信息编码的潜力.
  • 在AFM材料中检测Neel状态是具有挑战性的,因为它们的净磁矩为零.

研究的目的:

  • 展示在2D AFM材料中检测Néel向量的方法.
  • 为了利用化 (WSe2) 中的局部缺陷作为探测磁顺序的光学传感器.
  • 为了研究CrPS4/WSe2异构结构中的自旋偏振电荷转移和波段对齐.

主要方法:

  • 使用散装CrPS4和单层WSe2.2制造异构结构.
  • 使用循环极化光的光学表征.
  • 密度函数理论 (DFT) 计算以确定带对齐.
  • 磁场 (B-场) 的应用,以探测磁性秩序.

主要成果:

  • 在CrPS4/WSe2异构中观察到自旋偏向的电荷转移,与II型带对齐一致.
  • 证明了WSe2中的局部缺陷作为AFM磁顺序的有效光学探测器.
  • 在A型AFM模式下,无论应用B场,都表现出恒定的偏振过渡行为.

结论:

  • 开发了一种光学方法,用缺陷激子来描述2D AFM材料中的磁性状态.
  • 突出了CrPS4和WSe2异构结构对于未来的自旋电子和计算应用的潜力.
  • 开辟了进一步研究光学探测和操纵AFM状态的途径.