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Related Concept Videos

Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

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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...
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NMR Spectroscopy: Spin–Spin Coupling01:08

NMR Spectroscopy: Spin–Spin Coupling

1.7K
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...
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¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

1.1K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.1K
The Pauli Exclusion Principle03:06

The Pauli Exclusion Principle

51.1K
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:
51.1K
Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

1.1K
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,...
1.1K
Atomic Nuclei: Nuclear Spin01:08

Atomic Nuclei: Nuclear Spin

3.2K
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...
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Quantum Sensing with Spin Defects Beyond Diamond.

Henry Roberts1,2, Hamza Abudayyeh2,3, Xiaoqin Li2,3

  • 1Department of Electrical and Computer Engineering and Microelectronics Research Center, University of Texas at Austin, Austin, Texas 78712, United States.

ACS Nano
|June 16, 2025
PubMed
Summary
This summary is machine-generated.

Spin defects in novel semiconductor materials like silicon carbide and hexagonal boron nitride are advancing quantum sensing. These systems offer enhanced functionality for magnetometry, thermometry, and more.

Keywords:
GaNSiCcolor centersdiamondgallium nitridehBNhexagonal boron nitrideintegrationquantum photonicsquantum sensingsilicon carbidespin defects

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Area of Science:

  • Solid-state physics
  • Quantum information science
  • Materials science

Background:

  • Spin defects in solids offer atom-like quantum properties integrated with semiconductor technology.
  • There is growing interest in diamond alternatives for quantum sensing, seeking enhanced functionality and leveraging the semiconductor ecosystem.

Purpose of the Study:

  • To review and compare spin defects in silicon carbide, hexagonal boron nitride, and gallium nitride.
  • To highlight their applications in various quantum sensing modalities.
  • To discuss quantum sensing protocols, sensitivity enhancement, and future challenges.

Main Methods:

  • Comparative review of existing literature on spin defects in selected solid-state materials.
  • Analysis of quantum sensing protocols and strategies for sensitivity enhancement.
  • Discussion of material properties relevant to quantum sensing applications.

Main Results:

  • Spin defects in silicon carbide, hexagonal boron nitride, and gallium nitride show promise for quantum sensing.
  • These materials offer diverse functionalities beyond traditional diamond-based systems.
  • Established protocols exist for magnetometry, electrometry, thermometry, and strain sensing using these defects.

Conclusions:

  • Spin defects in silicon carbide, hexagonal boron nitride, and gallium nitride are viable platforms for advanced quantum sensing.
  • Further research is needed to overcome challenges and fully realize their potential in the semiconductor ecosystem.
  • The field is progressing towards practical, scalable quantum sensing solutions.