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相关概念视频

Quantum Numbers02:43

Quantum Numbers

It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
The Pauli Exclusion Principle03:06

The Pauli Exclusion Principle

The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
Valence Bond Theory02:42

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
Atomic Nuclei: Nuclear Spin01:08

Atomic Nuclei: Nuclear Spin

All atomic particles possess an intrinsic angular momentum, or 'spin'. Electrons, protons, and neutrons each have a spin value of ½, although protons and neutrons in nuclei may have higher half-integer spins owing to energetic factors.
Atomic nuclei have a net nuclear spin, , which can have an integer or half-integer value. In atomic nuclei, the spins of protons are paired against each other but not with neutrons, and vice versa. Consequently, an even number of protons does not contribute to...
Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

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 one, the...
Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.

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相关实验视频

Updated: Jul 23, 2026

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
15:47

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Published on: November 1, 2013

量子自旋液体中的洞

Xu1, Aeppli, Bisher

  • 1Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA. NEC Research Institute, 4 Independence Way, Princeton, NJ 08540, USA. National Institute of Standards and Technology Center for Neutron Research, Gaithersburg, MD 20899, USA. Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA. ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, UK. Electrotechnical Laboratory, Tsukuba 305, Japan. Department of Advanced Materials Science, Graduate School of Frontier Sciences, University of Tokyo Hongo, Tokyo 113-8656, Japan.

Science (New York, N.Y.)
|July 21, 2000
PubMed
概括

反铁磁滴在化氧化量子磁体中的杂质周围形成核. 这些水滴受到量子液体相关性的影响,解释了在能量间隙下观察到的磁激发.

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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

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相关实验视频

Last Updated: Jul 23, 2026

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
15:47

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Published on: November 1, 2013

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
11:33

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

科学领域:

  • 凝聚物质物理学 凝聚物质物理学
  • 量子磁力 量子磁力 量子磁力 量子磁力
  • 材料科学 材料科学 材料科学

背景情况:

  • 基因化合物是一个基于氧化的量子磁铁,具有具有合作单元基态和磁激励间隙的自旋液体.
  • 的兴奋剂引入了低于这个差距的刺激,其特点是不相称的结构因子.

研究的目的:

  • 为了研究化氧化量子磁铁的磁性行为.
  • 为在杂质周围核化磁结构提供实验证据.
  • 为了解释在添加氧化中观察到的低能磁刺激的起源.

主要方法:

  • 利用磁性中子散射来探测磁性结构和刺激.
  • 分析杂样品的结构因子,以确定磁性排序.
  • 将实验数据与磁滴核化的理论模型进行比较.

主要成果:

  • 磁中子散射证实了杂质周围反铁磁滴的核化.
  • 观察到的差距以下的激发与弱相互作用的反铁磁滴相一致.
  • 发现滴滴大小是由底层量子液体的相关长度控制的.

结论:

  • 这项研究提供了磁极化云在合过渡金属氧化物中孔周围的定量证据.
  • 具有中心相位移的反铁磁滴的模型成功地解释了实验观测.
  • 这项工作提供了关于杂质,量子自旋液体和新出现的磁现象之间的相互作用的见解.