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

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
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

893
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
893
Atomic Nuclei: Larmor Precession Frequency01:11

Atomic Nuclei: Larmor Precession Frequency

1.6K
The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession,...
1.6K
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

273
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...
273
Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

3.6K
The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
3.6K
Divergence and Curl of Magnetic Field01:26

Divergence and Curl of Magnetic Field

3.1K
The magnetic field due to a volume current distribution given by the Biot–Savart Law can be expressed as follows:
3.1K

You might also read

Related Articles

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

Sort by
Same author

Harnessing Plasmonic Heating for Switching in Antiferromagnets.

Physical review letters·2026
Same author

Breaking Surface-Plasmon Excitation Constraint via Surface Spin Waves.

Physical review letters·2024
Same author

Bath-Induced Spin Inertia.

Physical review letters·2024
Same author

Nonlinear Topological Magnon Spin Hall Effect.

Physical review letters·2023
Same author

Effect of Urea Coated with Polyaspartic Acid on the Yield and Nitrogen Use Efficiency of Sorghum (<i>Sorghum bicolor</i>, (L.) Moench.).

Plants (Basel, Switzerland)·2022
Same author

[Clinical observation on filiform-fire needling of "<i>Biaoben</i> acupoint combination" for 33 cases of sequelae of coronavirus disease 2019 during recovery period].

Zhongguo zhen jiu = Chinese acupuncture & moxibustion·2022

Related Experiment Video

Updated: Aug 28, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

9.1K

Twisted Magnon Frequency Comb and Penrose Superradiance.

Zhenyu Wang1, H Y Yuan2, Yunshan Cao1

  • 1School of Electronic Science and Engineering and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China.

Physical Review Letters
|September 16, 2022
PubMed
Summary

Researchers studied twisted magnons in nanodisks, observing a frequency comb generated by magnon-vortex interactions. This phenomenon, the twisted magnon frequency comb (TMFC), shows potential for generating twisted magnons with high orbital angular momentum (OAM).

More Related Videos

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
07:42

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Published on: December 15, 2021

3.2K
In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
09:39

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation

Published on: May 27, 2013

12.5K

Related Experiment Videos

Last Updated: Aug 28, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

9.1K
Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
07:42

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Published on: December 15, 2021

3.2K
In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
09:39

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation

Published on: May 27, 2013

12.5K

Area of Science:

  • Condensed matter physics
  • Magnonics
  • Spintronics

Background:

  • Nonlinear magnon-vortex interactions in ferromagnetic nanodisks are crucial for understanding spin-wave dynamics.
  • Circular geometry and vortex cores introduce unique spin-wave behaviors, including phase dislocations.

Purpose of the Study:

  • To investigate the quantization effects of nonlinear magnon-vortex interactions.
  • To explore the generation and properties of twisted magnons and their frequency combs.
  • To analyze magnonic superradiance phenomena in nanodisks.

Main Methods:

  • Theoretical study of spin-wave fields in ferromagnetic nanodisks.
  • Analysis of magnon scattering off a gyrating vortex core.
  • Application of perpendicular magnetic fields to induce specific states.

Main Results:

  • Circular geometry induces spiral phase dislocations in spin-wave fields, carrying quantized orbital angular momentum (OAM).
  • Scattering of twisted magnons off a vortex core generates a twisted magnon frequency comb (TMFC) with discrete spectral lines.
  • Magnonic Penrose superradiance observed, amplifying higher-order TMFC modes while lower-order modes are trapped in the vortex core's gyrating orbit.

Conclusions:

  • The study demonstrates a method for generating twisted magnons with large OAM.
  • The findings suggest potential for improving the flatness of magnon frequency combs.
  • The observed phenomena offer insights into quantum dynamics analogous to black hole physics.