density wave

density wave

[′den·səd·ē ‚wāv]
(physics)
A sound wave or other type of material wave which causes the density of the matter through which it passes to alternately rise above and drop below its mean value.
References in periodicals archive ?
Furthermore, the microscopic mechanism of charge density wave capture at singular pinning sites will be addressed.
There are new chapters on topics such as Dirac electrons, super symmetry, charge density wave states in higher Landau levels, and unconventional QH effects in graphene.
The density wave observations will tell more about the ring surface mass density, its vertical thickness and other physical properties.
c] = 42 K, the highest of any 2-1-4 system, while long range spin density wave magnetic order of the Cu moments is also observed in this material.
This work now centres on analyzing the microscopic changes taking place within a superconductor when it hits that key temperature where mobile electrons organize into a wave-like periodic structure called a charge density wave.
On the basis of their observations and modeling according to spiral density wave theory, the team suspects that dynamic processes, possibly resulting from planets in the disk, may be responsible for its spiral shape.
Specific topics include the mutual attractive interaction between polarons giving rise to non- symmetry-breaking metal-insulator transitions, symmetry-breaking metal-charge density wave insulator transitions, bipolaronic superconductivity and resonant pairing, electron-density-driven polarization catastrophes, Wigner crystallization in systems with long-range Coulomb interaction, and the influence of strong correlations as well as orbital degeneracy on the effectiveness of the electron-phonon interaction.
The bright-white bands at left are the peaks of a density wave induced by the moon Janus.
This disturbance is known as a density wave because it draws material together by gravitational attraction.
The leading theory to explain the formation of a "grand-design" spiral -- a symmetrical pair of spiral arms like that in M51 -- invokes the idea of a density wave.
In the "fields" model, the signal propagates from left to right as an electromagnetic wave in the dielectric, inducing current density waves in conductors subjected to those waves (both signal and "ground," or any other adjacent conductor).
They include changing perspectives on charge density waves, something that could breathe new life into the field of high temperature superconductors.