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

Theory of Metallic Conduction01:17

Theory of Metallic Conduction

1.9K
The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
1.9K
Valence Bond Theory02:42

Valence Bond Theory

11.5K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.5K
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

753
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
753
Ferromagnetism01:31

Ferromagnetism

3.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
3.4K
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

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

1.9K
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...
1.9K
Types Of Superconductors01:28

Types Of Superconductors

1.7K
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
1.7K

You might also read

Related Articles

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

Sort by
Same author

Magnet-Free Nonreciprocal Edge Plasmons in Optically Pumped Bilayer Graphene.

Nanomaterials (Basel, Switzerland)·2025
Same author

Unveiling Three Types of Fermions in a Nodal Ring Topological Semimetal through Magneto-Optical Transitions.

Physical review letters·2025
Same author

Ultrafast Control over Stiffening and Softening of Coherent Interlayer Coupling in WSe<sub>2</sub>/WS<sub>2</sub> Heterobilayers.

Nano letters·2024
Same author

Optical Transitions of a Single Nodal Ring in SrAs_{3}: Radially and Axially Resolved Characterization.

Physical review letters·2023
Same author

Role of Local Conductivities in the Plasmon Reflections at the Edges and Stacking Domain Boundaries of Trilayer Graphene.

The journal of physical chemistry letters·2023
Same author

Utilizing the Metaverse for Learner-Centered Constructivist Education in the Post-Pandemic Era: An Analysis of Elementary School Students.

Journal of Intelligence·2022

Related Experiment Video

Updated: Mar 14, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

8.7K

Collective modes in multi-Weyl semimetals.

Seongjin Ahn1, E H Hwang2, Hongki Min1

  • 1Department of Physics and Astronomy and Center for Theoretical Physics, Seoul National University, Seoul 08826, Korea.

Scientific Reports
|October 1, 2016
PubMed
Summary
This summary is machine-generated.

We studied collective modes in 3D gapless multi-Weyl semimetals. Chirality and band dispersion significantly influence plasma frequencies, with undamped plasmons observed in anisotropic systems due to depolarization shifts.

More Related Videos

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

10.4K
Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems
07:44

Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems

Published on: April 28, 2016

15.7K

Related Experiment Videos

Last Updated: Mar 14, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

8.7K
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

10.4K
Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems
07:44

Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems

Published on: April 28, 2016

15.7K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Materials

Background:

  • Collective excitations, such as plasmons, are crucial for understanding electronic properties in materials.
  • Gapless semimetals, particularly multi-Weyl semimetals, exhibit unique electronic behaviors due to their band structures.
  • Anisotropic energy band dispersions introduce complexities not present in isotropic systems.

Purpose of the Study:

  • To investigate the behavior of collective modes (plasmons) in 3D gapless multi-Weyl semimetals.
  • To analyze the impact of anisotropic energy band dispersions and chirality on plasma frequencies.
  • To compare these effects with isotropic band dispersion models.

Main Methods:

  • Analytical calculations of long-wavelength plasma frequencies.
  • Inclusion of interband transitions and chiral properties of charge carriers.
  • Analysis of Landau damping and depolarization shifts.

Main Results:

  • Interband transitions and chirality cause a depolarization shift in plasma frequencies for both isotropic and anisotropic cases.
  • Long-wavelength plasmons in anisotropic systems remain undamped over a wide density range due to chirality-induced shifts.
  • The density dependence of plasma frequencies in anisotropic systems shows hybrid behavior influenced by linear and non-linear dispersion directions.

Conclusions:

  • Band dispersion and chirality are key factors governing plasmon behavior in 3D gapless chiral semimetals.
  • Anisotropic band structures lead to unique plasmon dynamics, distinct from isotropic counterparts.
  • The findings offer a detailed understanding of plasmon behavior in complex chiral electronic systems.