Related Experiment Video
Updated: Dec 10, 2025
09:06
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.4K
Stoneley-type waves in anisotropic periodic superlattices.
1Institute of Crystallography FSRC "Crystallography and Photonics", Russian Academy of Sciences, Leninskii pr. 59, Moscow 119333, Russia.
Ultrasonics
|September 4, 2020
Summary
This study reveals that phononic bicrystals can host up to six interfacial acoustic waves per stopband. This maximum number of Stoneley-type waves is achieved in asymmetric superlattice arrangements.
Area of Science:
- Acoustics
- Materials Science
- Solid State Physics
Background:
- Superlattices offer unique wave propagation properties.
- Phononic crystals and bicrystals are key in controlling acoustic waves.
- Interfacial waves at boundaries are crucial for device applications.
Purpose of the Study:
- To investigate interfacial acoustic waves in one-dimensional phononic bicrystals.
- To determine the maximum number of localized Stoneley-type waves.
- To analyze wave behavior in superlattices with general anisotropy.
Main Methods:
- Theoretical analysis of acoustic wave propagation.
- Modeling of one-dimensional phononic bicrystals with layered structures.
- Examination of wave behavior within stopbands for varying tangential wavenumbers.
Main Results:
- Maximum of three interfacial waves in the lowest stopband.
- Maximum of six interfacial waves in upper stopbands.
- The total number of waves equals the sum of waves in a bicrystal and its complementary counterpart.
Conclusions:
- The number of interfacial acoustic waves is bounded by the sum of waves in a bicrystal and its swapped counterpart.
- Achieving the maximum of six waves in a stopband is demonstrated.
- Results are general for anisotropic materials and specified for monoclinic symmetry.
More Related Videos
Related Concept Videos
01:17Standing Waves
5.1K
Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a refrigerator, which is one example of standing waves. Vibrations from the refrigerator motor create waves on the milk that oscillate up and down but do not seem to move across the surface. These waves are formed or created by the superposition of two or more identical moving waves in opposite directions. The waves move through each other, with their...
5.1K
01:28Standing Waves in a Cavity
1.3K
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:
1.3K
02:32The de Broglie Wavelength
32.3K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
32.3K
01:15Standing Electromagnetic Waves
2.0K
Electromagnetic waves can be reflected; the surface of a conductor or a dielectric can act as a reflector. As electric and magnetic fields obey the superposition principle, so do electromagnetic waves. The superposition of an incident wave and a reflected electromagnetic wave produces a standing wave analogous to the standing waves created on a stretched string.
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...
2.0K
01:03Modes of Standing Waves - I
3.6K
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...
3.6K
01:04Modes of Standing Waves: II
1.4K
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....
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....
1.4K