Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Spin–Spin Coupling Constant: Overview

Spin–Spin Coupling Constant: Overview

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 have a...

Double Resonance Techniques: Overview

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...

NMR Spectroscopy: Spin–Spin Coupling

NMR Spectroscopy: Spin–Spin Coupling

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 in...

¹H NMR: Long-Range Coupling

¹H NMR: Long-Range Coupling

The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene π orbitals.

Spin–Spin Coupling: One-Bond Coupling

Spin–Spin Coupling: One-Bond Coupling

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,...

IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration

IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration

A covalently bonded heteronuclear diatomic molecule can be modeled as two vibrating masses connected by a spring. The vibrational frequency of the bond can be expressed using an equation derived from Hooke's law, which describes how the force applied to stretch or compress a spring is proportional to the displacement of the spring. In this case, the atoms behave like masses, and the bond acts like a spring.
According to Hooke's law, the vibrational frequency is directly proportional to the...

You might also read

Related Articles

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

Sort by

Same author

Observation of photo-induced plasmon-phonon coupling in PbTe via ultrafast x-ray scattering.

Structural dynamics (Melville, N.Y.)·2022

Same author

Photocurrent-driven transient symmetry breaking in the Weyl semimetal TaAs.

Nature materials·2021

Same author

Longitudinal Flow Decorrelations in Xe+Xe Collisions at sqrt[s_{NN}]=5.44 TeV with the ATLAS Detector.

Physical review letters·2021

Same author

Search for Dark Matter Produced in Association with a Dark Higgs Boson Decaying into W^{±}W^{∓} or ZZ in Fully Hadronic Final States from sqrt[s]=13 TeV pp Collisions Recorded with the ATLAS Detector.

Physical review letters·2021

Same author

Medium-Induced Modification of Z-Tagged Charged Particle Yields in Pb+Pb Collisions at 5.02 TeV with the ATLAS Detector.

Physical review letters·2021

Same author

Release and Transport of Flavors In Vivo: Physicochemical, Physiological, and Perceptual Considerations.

Comprehensive reviews in food science and food safety·2021

Search research articles

Related Experiment Video

Updated: Jul 7, 2026

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

Coupling between an optical phonon and the Kondo effect.

K S Burch¹, Elbert E M Chia, D Talbayev

¹Los Alamos National Laboratory, MS K771, MPA-CINT, Los Alamos, New Mexico 87545, USA. kburch@lanl.gov

Physical Review Letters

|February 1, 2008

Summary

This summary is machine-generated.

This study reveals Ytterbium-14-Manganese-Antimony (Yb14MnSb11) is a unique ferromagnetic, underscreened Kondo lattice. It demonstrates a novel coupling between optical phonon modes and the Kondo effect.

More Related Videos

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Related Experiment Videos

Last Updated: Jul 7, 2026

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Area of Science:

Condensed Matter Physics
Materials Science
Quantum Magnetism

Background:

The Kondo effect describes the interaction between localized magnetic moments and conduction electrons in metals.
Ferromagnetic Kondo lattices are rare, and understanding their properties is crucial for developing novel electronic materials.
Underscreened Kondo lattices present unique electronic and magnetic behaviors.

Purpose of the Study:

To investigate the ultrafast optical response of Ytterbium-14-Manganese-Antimony (Yb14MnSb11).
To provide further evidence for Yb14MnSb11 as the first d-electron, ferromagnetic, underscreened Kondo lattice.
To demonstrate the coupling between an optical phonon mode and the Kondo effect.

Main Methods:

Ultrafast optical spectroscopy was employed to probe the electronic and vibrational properties.
Analysis focused on the dynamic response of Yb14MnSb11 under optical excitation.
Correlating optical phonon behavior with Kondo lattice characteristics.

Main Results:

Yb14MnSb11 exhibits characteristics consistent with a d-electron, ferromagnetic, underscreened Kondo lattice.
The study provides the first experimental evidence of coupling between an optical phonon and the Kondo effect.
Ultrafast optical response measurements revealed unique dynamic interactions within the material.

Conclusions:

Yb14MnSb11 represents a significant discovery in the field of Kondo lattice systems.
The observed coupling between phonons and the Kondo effect opens new avenues for research in correlated electron systems.
This work advances the understanding of complex magnetic and electronic phenomena in intermetallic compounds.