Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

NMR Spectroscopy: Spin–Spin Coupling01:08

NMR Spectroscopy: Spin–Spin Coupling

3.3K
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...
3.3K
Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

1.5K
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,...
1.5K
Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

1.5K
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...
1.5K
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

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

1.7K
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...
1.7K
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)01:22

Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)

1.5K
Vicinal or three-bond coupling is commonly observed between protons attached to adjacent carbons. Here, nuclear spin information is primarily transferred via electron spin interactions between adjacent C‑H bond orbitals. This generally favors the antiparallel arrangement of spins, so 3J values are usually positive.
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the involved orbitals. The...
1.5K
Atomic Nuclei: Nuclear Spin01:08

Atomic Nuclei: Nuclear Spin

5.2K
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 contribute to...
5.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

"The incredible adventures of Apollo and Rosetta in space": Training executive functions in children with attention-deficit/hyperactivity disorder.

Applied neuropsychology. Child·2026
Same author

Intrinsic annealing in a hybrid memristor-magnetic tunnel junction Ising machine.

Nature communications·2026
Same author

Phase-Coherent Transport in Two-Dimensional Tellurium Flakes.

ACS applied electronic materials·2026
Same author

Coherent microwave comb generation via the Josephson effect.

Nature communications·2026
Same author

Robust and localised control of a 10-spin qubit array in germanium.

Nature communications·2025
Same author

Artificial Intelligence-Assisted Workflow for Transmission Electron Microscopy: From Data Analysis Automation to Materials Knowledge Unveiling.

Advanced materials (Deerfield Beach, Fla.)·2025

Related Experiment Video

Updated: Feb 11, 2026

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
08:48

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Published on: September 25, 2020

6.3K

Electrical Spin Driving by g-Matrix Modulation in Spin-Orbit Qubits.

Alessandro Crippa1, Romain Maurand1, Léo Bourdet2

  • 1Université Grenoble Alpes and CEA INAC-PHELIQS, F-38000 Grenoble, France.

Physical Review Letters
|April 26, 2018
PubMed
Summary
This summary is machine-generated.

We demonstrate coherent spin rotations in silicon hole spin qubits using gate-voltage modulation. A g-matrix formalism clarifies the physical mechanisms driving these rotations, applicable to other spin-orbit qubits.

More Related Videos

Study of Protein Dynamics via Neutron Spin Echo Spectroscopy
08:03

Study of Protein Dynamics via Neutron Spin Echo Spectroscopy

Published on: April 13, 2022

2.6K
Microfluidic Dry-spinning and Characterization of Regenerated Silk Fibroin Fibers
08:28

Microfluidic Dry-spinning and Characterization of Regenerated Silk Fibroin Fibers

Published on: September 4, 2017

10.5K

Related Experiment Videos

Last Updated: Feb 11, 2026

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
08:48

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Published on: September 25, 2020

6.3K
Study of Protein Dynamics via Neutron Spin Echo Spectroscopy
08:03

Study of Protein Dynamics via Neutron Spin Echo Spectroscopy

Published on: April 13, 2022

2.6K
Microfluidic Dry-spinning and Characterization of Regenerated Silk Fibroin Fibers
08:28

Microfluidic Dry-spinning and Characterization of Regenerated Silk Fibroin Fibers

Published on: September 4, 2017

10.5K

Area of Science:

  • Quantum computing
  • Solid-state physics
  • Spintronics

Background:

  • Coherent spin rotations are crucial for semiconductor spin qubits.
  • Spin-orbit coupling enables gate-voltage-driven spin manipulation.
  • Hole spin qubits in silicon are a promising platform.

Purpose of the Study:

  • Investigate mechanisms of gate-voltage-driven spin rotations in silicon hole spin qubits.
  • Characterize the Rabi frequency's angular and gate-voltage dependence.
  • Analyze the anisotropy of the hole g factor.

Main Methods:

  • Experimental demonstration of hole spin qubit in silicon.
  • Measurement of Rabi frequency's full angular dependence.
  • Gate-voltage dependence and anisotropy measurements of the hole g factor.
  • Application of g-matrix formalism.

Main Results:

  • Coherent spin rotations achieved via resonant gate-voltage modulation.
  • Identified and discriminated two distinct physical mechanisms.
  • Demonstrated the utility of g-matrix formalism for qubit analysis.
  • Showcased the anisotropy of the hole g factor.

Conclusions:

  • Gate-voltage modulation is an effective method for coherent spin rotations in silicon hole spin qubits.
  • The g-matrix formalism provides a unified framework for understanding spin-orbit qubit mechanisms.
  • This approach is broadly applicable to other spin-orbit-coupled qubits.