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

Symmetry Elements in a Crystal01:27

Symmetry Elements in a Crystal

Crystal symmetry operations are isometric transformations that map objects onto indistinguishable copies while preserving distances, angles, and volumes. The simplest symmetry operation is translation, which shifts the entire infinite crystal lattice parallelly by a translation vector.Crystallographic rotations involve rotations by an angle of 2π/n around an axis without changing the positions of points on the axis. It is called the rotational axis of the symmetry, denoted by n. The combination...
Imperfections in Crystal Structure: Point, Line and Plane Defects01:25

Imperfections in Crystal Structure: Point, Line and Plane Defects

A perfect crystal, in theory, has a uniform structure with the same unit cell and lattice points throughout. However, any deviation from this periodic arrangement is known as an imperfection or defect. These defects can be categorized into three types: point, line, and plane defects.Point defects occur when there is a deviation from the ideal due to missing atoms, displaced atoms, or additional atoms. These imperfections might occur due to imperfect packing during crystallization or because of...
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
Imperfections in Crystal Structure: Stoichiometric Point Defects01:26

Imperfections in Crystal Structure: Stoichiometric Point Defects

Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...
Crystallographic Point Groups01:29

Crystallographic Point Groups

Crystallographic point groups represent the various symmetry operations that can occur within crystals. They are unique in that at least one point will always remain unchanged during these actions. For instance, consider the triclinic system. This system, devoid of any axis or plane of symmetry, aligns with the C1 and Ci point groups.where Cᵢ is characterized solely by a center of inversion.Contrastingly, the monoclinic system introduces an element of symmetry. This system with one plane and...
Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.

You might also read

Related Articles

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

Sort by
Same author

Topological Slot in Phononic Crystals.

Physical review letters·2026
Same author

Recording skin oxygenation by dual-wavelength ultra-bandwidth optoacoustic mesoscopy.

Npj imaging·2026
Same author

Higher-order exceptional ring semimetal with real hinge states in acoustic metamaterials.

National science review·2026
Same author

Acoustic Bound Pair States in the Continuum Induced by Off-Site Two-Body Interactions.

Physical review letters·2026
Same author

BRD4 regulation of PIM1 identifies a novel therapeutic vulnerability in acute megakaryoblastic leukemia.

Cancer cell international·2026
Same author

Genetics and reproduction in buffalo: latest insights into the genetic architecture of reproductive traits.

The Journal of reproduction and development·2026

Related Experiment Video

Updated: Jun 24, 2026

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices
11:24

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

Published on: July 11, 2025

Topological Sliding Moiré Phononic Crystals.

Zhonghao Fu1, Yinfei Zhang1, Qing Wang1

  • 1Wuhan University, Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan 430072, China.

Physical Review Letters
|June 22, 2026
PubMed
Summary

Researchers designed novel topological phononic crystals using a moiré superlattice. These sliding moiré phononic crystals exhibit unique topological properties and localized bulk states for advanced acoustic applications.

More Related Videos

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

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

Published on: November 21, 2019

Related Experiment Videos

Last Updated: Jun 24, 2026

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices
11:24

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

Published on: July 11, 2025

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

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

Published on: November 21, 2019

Area of Science:

  • Topological physics
  • Classical acoustics
  • Condensed matter physics

Background:

  • Topological physics is expanding into classical systems like photonics and acoustics.
  • Existing topological acoustic materials often rely on conventional lattices and specific symmetries.
  • A need exists for new designs overcoming these limitations.

Purpose of the Study:

  • To introduce a novel design for topological phononic crystals utilizing a moiré superlattice.
  • To explore the topological properties and potential applications of sliding moiré phononic crystals.
  • To demonstrate the creation of robust topological edge states and localized bulk states.

Main Methods:

  • Construction of topological phononic crystals via sliding moiré superlattices.
  • Characterization of topological properties using dynamical Chern number.
  • Analysis of bulk and edge state behavior under sliding modulation.

Main Results:

  • Sliding moiré phononic crystals exhibit nontrivial topology and topological pumping of edge states.
  • The topological moiré edge states are insensitive to edge geometry.
  • One-dimensional moiré flat bulk bands lead to localized bulk states, forming independent signal channels.

Conclusions:

  • The proposed sliding moiré phononic crystals offer a unique platform for topological acoustics.
  • These materials enable robust, geometry-independent edge states and localized bulk states.
  • Potential applications include advanced acoustic communications and isolation in integrated devices.