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Related Concept Videos

Valence Bond Theory02:42

Valence Bond Theory

8.8K
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...
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Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

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In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
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Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

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Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
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Updated: Apr 23, 2026

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
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Graphene spintronics.

Wei Han1, Roland K Kawakami2, Martin Gmitra3

  • 11] International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China [2] Collaborative Innovation Center of Quantum Matter, Beijing 100871, China [3] IBM Almaden Research Center, San Jose, California 95120, USA.

Nature Nanotechnology
|October 7, 2014
PubMed
Summary
This summary is machine-generated.

Graphene spintronics research explores spin injection, transport, and relaxation. Future work focuses on spin transistors and novel properties in 2D materials.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Graphene's isolation has spurred extensive research into its spin-dependent properties.
  • Graphene-based spintronic devices are a key area of investigation.

Purpose of the Study:

  • To review the current state of experimental and theoretical research in graphene spintronics.
  • To highlight key phenomena such as spin injection, transport, and relaxation.

Main Methods:

  • Review of experimental findings.
  • Analysis of theoretical models.
  • Synthesis of current research trends.

Main Results:

  • Comprehensive overview of spin injection and transport in graphene.
  • Discussion of defect-induced magnetic moments and spin-orbit coupling.
  • Summary of spin relaxation mechanisms in graphene.

Conclusions:

  • Graphene spintronics is a rapidly advancing field with significant potential.
  • Future research should focus on device applications and exploring exotic physical properties.
  • Further investigation into topological states and proximity effects in 2D materials is warranted.