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
Quantum Numbers02:43

Quantum Numbers

52.4K
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.
52.4K

You might also read

Related Articles

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

Sort by
Same author

Spin-polarized hot electron transport versus spin pumping mediated by local heating.

Journal of physics. Condensed matter : an Institute of Physics journal·2022
Same author

Nonlocal Spin Transport as a Probe of Viscous Magnon Fluids.

Physical review letters·2019
Same author

Spin-Wave Amplification and Lasing Driven by Inhomogeneous Spin-Transfer Torques.

Physical review letters·2019
Same author

Tunable long-distance spin transport in a crystalline antiferromagnetic iron oxide.

Nature·2018
Same author

Asymmetric and Symmetric Exchange in a Generalized 2D Rashba Ferromagnet.

Physical review letters·2018
Same author

Synthetic Antiferromagnetic Spintronics.

Nature physics·2018

Related Experiment Video

Updated: Feb 15, 2026

Production and Targeting of Monovalent Quantum Dots
10:16

Production and Targeting of Monovalent Quantum Dots

Published on: October 23, 2014

26.1K

Spin Switching via Quantum Dot Spin Valves.

N M Gergs1, S A Bender1, R A Duine1,2

  • 1Institute for Theoretical Physics, Center for Extreme Matter and Emergent Phenomena, Utrecht University, Leuvenlaan 4, 3584 CE Utrecht, The Netherlands.

Physical Review Letters
|January 20, 2018
PubMed
Summary
This summary is machine-generated.

We developed a theory for spin transport in quantum dot spin valves. Strong correlations allow voltage control of magnetic switching and readout via electrical resistance.

More Related Videos

Compact Quantum Dots for Single-molecule Imaging
17:14

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

18.7K
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

17.0K

Related Experiment Videos

Last Updated: Feb 15, 2026

Production and Targeting of Monovalent Quantum Dots
10:16

Production and Targeting of Monovalent Quantum Dots

Published on: October 23, 2014

26.1K
Compact Quantum Dots for Single-molecule Imaging
17:14

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

18.7K
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

17.0K

Area of Science:

  • Condensed matter physics
  • Quantum computing
  • Spintronics

Background:

  • Quantum dot spin valves offer potential for novel electronic devices.
  • Understanding spin transport and magnetization dynamics is crucial for spintronics.
  • Strong electron correlations in quantum dots present unique phenomena.

Purpose of the Study:

  • To develop a theoretical framework for spin transport and magnetization dynamics in quantum dot spin valves.
  • To investigate the role of strong correlations in controlling magnetic properties.
  • To demonstrate voltage-controlled magnetic switching and electrical readout of magnetic states.

Main Methods:

  • Development of a theoretical model for spin transport in a quantum dot system.
  • Incorporation of strong correlation effects into the theoretical framework.
  • Analysis of current-induced torques and their dependence on dot gate voltage.

Main Results:

  • The theory accounts for strong correlation effects in quantum dot spin valves.
  • Dot gate voltage provides control over current-induced torques on magnets.
  • Voltage-controlled magnetic switching and electrical readout of magnetic states are demonstrated.
  • The model is applicable to experimental systems like scanning-tunneling microscope tips.

Conclusions:

  • Strong correlations in quantum dot spin valves enable novel control mechanisms.
  • Voltage-controlled magnetic switching is achievable, paving the way for advanced spintronic devices.
  • The developed theory provides a foundation for designing and understanding quantum dot-based magnetic systems.