Sentences with phrase «with phonons»

Practical applications of spintronic devices in information processing require accurate knowledge of the strength of the electron spin interaction with phonons.

Interaction with phonons is one of the energy dissipation mechanisms in spintronics.

Their research has also introduced a new dimension to the emerging field of «phononics» which is the controlling and manipulating of heat flow with phonons (particles which transmit heat within solid materials).

Not exact matches

«Borophene is metallic in its typical state, with strong electron - phonon coupling to support possible superconductivity, and a rich band structure that contains Dirac cones, as in graphene,» Yakobson said.

Optic phonons, or crystal vibrations that can be excited with infrared light, can also be used to confine light to dimensions much smaller than the wavelength of light, while maintaining record - high efficiencies.

U.S. Naval Research Laboratory (NRL) scientists, in collaboration with researchers from the University of Manchester, U.K.; Imperial College, London; University of California San Diego; and the National Institute of Material Science (NIMS), Japan, have demonstrated that confined surface phonon polaritons within hexagonal boron nitride (hBN) exhibit unique metamaterial properties that enable novel nanoscale optical devices for use in optical communications, super-resolution imaging, and improved infrared cameras and detectors.

But some physicists see advantages to replacing the microwave resonator with a mechanical one that rings with quantized vibrations, or phonons.

The trick worked because relevant phonon peaks can be seen with much better resolution in the spectrum of nickel oxide under ultraviolet laser excitation,» Balandin added.

A central challenge of thermal physics — and of interfacial thermal conductance, specifically — is that phonons exist over a wide frequency range, and how phonons interact with interfaces and other phonons depends on their frequencies.

In partial transmission any diamond phonon can eat a metal phonon, even diamond phonons with frequencies far higher than can exist in the metal, so it hardly matters how stiff the metal is.»

«We realized that we could explain the data with what we call partial transmission processes, where metal phonons «feed» a much higher frequency diamond phonon at the interface.

Henry's successes in capturing the atomic vibrations of glass was due to the development of a new way of studying the dynamics of phonons, which he'd created with with Wei Lv, a doctoral student in his lab, Known as Green - Kubo Modal Analysis (GKMA), the new method uses molecular dynamics simulations to more accurately calculate the contributions different modes of vibration make to the heat conduction.

Measured along the longest plane, models with the octagons were nearly 20 percent better at transporting phonons than those without.

When a particle (such as a WIMP) collides with the detector, it creates crystal lattice vibrations (phonons) and releases electrons.

When two deuterium atoms fuse in his experiments, they produce helium - 4 together with energy, in the form of photons and lattice vibrations called «phonons».

In their experiments, an optical pump pulse centered at 800 nm excites via impulsive Raman scattering a coherent optical phonon with Ag symmetry [movie].

It also conflicts with the mainstream belief that magnons and phonons are stable over time.

In a solid, the absorption of a phonon makes an atom vibrate in its bonds with neighboring atoms; releasing the phonon allows the atom to relax.

But for much larger heat sources acting on the same material, phonons tend to collide with other phonons and scatter more often.

A phonon's mean free path is the distance a phonon can carry heat before colliding with another particle; the longer a phonon's mean free path, the better it is able to carry, or conduct, heat.

For example, if an engineer desires a material with certain thermal properties, the mean free path distribution could serve as a blueprint to design specific «scattering centers» within the material — locations that prompt phonon collisions, in turn scattering heat propagation, leading to reduced heat carrying ability.

The fact that this structural characteristic is common to all platinum group elements suggests that compounds based on these elements other than osmium are also likely to be associated with strong spin - phonon coupling.

The vibrations are called phonons, and the electron - phonon coupling the researchers measured was 10 times stronger than theory had predicted — making it strong enough to potentially play a role in unconventional superconductivity, which allows materials to conduct electricity with no loss at unexpectedly high temperatures.

Whereas the «glass - like» thermal conductivity of the clathrate Ba7.81 Ge40.67 Au5.33 has frequently been associated with a short phonon lifetime, this study measured for the first time to date a very long phonon lifetime using a large single crystal sample of high quality.

We study the phonons and their interactions with other exciations (electron, spin, magnon, other phonons) and nanostructures in materials.

The capability to tune the acoustic phonon dynamics in technologically relevant group IV nanostructures provides a promising prospect to control the propagation of acoustic and thermal phonons with great implications on nanoscale hypersound and thermal transport.

This paper addresses the phonon transport and the thermal conductance through a range of different molecular junctions, including alkyl chains with variable length, aliphatic - aromatic structures and polyaromatic junctions.

In this paper, by solving the Boltzmann transport equation (BTE) based on first - principles calculations, we performed a comprehensive study of the phonon transport properties of ML GaN, with detailed comparison to bulk GaN, 2D graphene, silicene and ML BN with similar honeycomb structure.

This is particularly true for electrons and phonons transport in semiconductors where a lot of efforts were done to synthetize nanostructures with properties radically different from their bulk counterpart.

Systematic analysis is performed based on the study of the contribution from phonon branches, comparison among the mode level phonon group velocity and lifetime, the detailed process and channels of phonon — phonon scattering, and phonon anharmonicity with potential energy well.

Our results, together with experimental measurements of the phonon dispersion curve, allow us to predict the nature of the droplet.

The Nanophononics Day is celebrated in May 26th 2014, collocated with Symposium D of the European Materials Research Society (E-MRS) Spring Meeting 2014 in Lille, entitled «Phonons and Fluctuation in Low Dimensional Structures» and with ICREA Prof Dr Clivia M Sotomayor Torres again among its organizers.

But GaAs with its 1.47 eV bandgap readily emits 844 nm photons, which is the bandgap photon energy, because it is a direct gap semiconductor, and that transition is allowed, without any momentum discrepancy, requiring a phonon interraction as well.