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

Three-Dimensional Analysis of Strain

Three-Dimensional Analysis of Strain

Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...

Modes of Standing Waves - I

Modes of Standing Waves - I

A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This...

Standing Waves in a Cavity

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:

Modes of Standing Waves: II

Modes of Standing Waves: II

The starting point for expressing the modes of standing waves is understanding the boundary conditions that the waves must follow. The boundary conditions are derived from the physical understanding of how the standing waves are sustained, that is, how the vibrating particles of the medium behave at the boundaries imposed on them.
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end....

Theory of Metallic Conduction

Theory of Metallic Conduction

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,...

Sound Waves: Interference

Sound Waves: Interference

Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...

You might also read

Related Articles

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

Sort by

Same author

Lossy phononic metamaterials for valley nonreciprocity.

Nature communications·2026

Same author

Harmonic non-Hermitian skin effect.

Nature communications·2026

Same author

Satellite Dirac cones in phononic crystals.

Nature communications·2025

Same author

Loss induced delocalization of topological boundary modes.

Nature communications·2025

Same author

Observation of momentum-band topology in PT-symmetric Floquet lattices.

Nature communications·2025

Same author

Nonlocality-enabled photonic analogies of parallel spaces, wormholes and multiple realities.

Nature communications·2025

Search research articles

Related Experiment Video

Updated: Oct 5, 2025

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

Published on: July 17, 2020

Topological dislocation modes in three-dimensional acoustic topological insulators.

Liping Ye¹, Chunyin Qiu², Meng Xiao³

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

Nature Communications

|January 27, 2022

Summary

Researchers experimentally demonstrate bulk-dislocation correspondence in acoustic topological insulators. They observed unique one-dimensional topological modes along controllable dislocations, enabling unidirectional wave propagation.

More Related Videos

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics

Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics

Published on: August 5, 2020

Related Experiment Videos

Last Updated: Oct 5, 2025

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

Published on: July 17, 2020

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics

Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics

Published on: August 5, 2020

Area of Science:

Condensed Matter Physics
Topological Materials
Acoustic Metamaterials

Background:

Dislocations in 3D materials create gapless helical modes due to real-space topology interplay with band topology.
This bulk-dislocation correspondence is analogous to bulk-boundary correspondence but lacks extensive experimental validation.
Challenges include controlling dislocations and detecting topological signals in solid-state systems.

Purpose of the Study:

To provide unambiguous experimental evidence for bulk-dislocation correspondence.
To investigate topological dislocation modes in a controllable acoustic system.
To explore the potential for wave manipulation using these topological modes.

Main Methods:

Utilized a 3D acoustic weak topological insulator with precisely controllable dislocations.
Directly measured the gapless dispersion of 1D topological dislocation modes.
Investigated the transport properties of these modes along engineered dislocation paths.

Main Results:

Confirmed the existence of gapless topological dislocation modes, validating bulk-dislocation correspondence.
Demonstrated pseudospin-locked unidirectional guiding of these modes along arbitrary dislocation paths.
Showcased unprecedented control over wave propagation via topological dislocation transport.

Conclusions:

The study provides the first compelling experimental evidence for bulk-dislocation correspondence in acoustic systems.
Topological dislocation modes offer novel pathways for controlling wave propagation in classical wave systems.
This work opens avenues for designing advanced acoustic devices with tailored functionalities.