Sentences with phrase «thermal phonons»

Nanoscale phononic crystals can be used in many areas including high - frequency signal processing and the control of thermal phonons.

Resume: Nanoscale phononic crystals can be used in many areas including high - frequency signal processing and the control of thermal phonons.

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.

The observation suggests that thermal phonons must exist as waves similar to electronic, photonic or acoustic waves.

And in the same way that white light is actually composed of many different colors of light, these thermal phonons are made up of many different frequencies — each carrying varying amounts of heat.

Not exact matches

Phonons thus can't carry heat across a porous material as efficiently, giving the material a low thermal conductivity, which turns out to increase the efficiency of heat - to - electricity conversion.

A progress article published June 23 in the journal Nature Materials describes recent developments and predicts future advances in phonon wave interference and thermal bandgap materials.

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.

Scientists can accurately predict the thermal conductivity of many crystalline materials using expressions based on the widely - used «phonon gas model.»

«The lower the number of non-hexagonal rings in the junction (for example three octagons versus six heptagons), the lower the number of undesirable rings and thus lower phonon scattering and improved thermal transport.»

«The idea of a magnon - phonon coupling has already been around as a possible explanation for the uniquely low coefficient of thermal expansion of the invar materials.

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.

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.

Lattice thermal transport can be surpressed by phonon nesting, resonance, nanostructure, and etc..

Resume: Progress in the last few decades in nano - scale thermal transport has enabled a significant degree of control over heat and sound propagation by lattice vibrations - phonons.

In new neutron experiments conducted at the Institut Laue - Langevin (ILL) and the French National Centre for Scientific Research (CNRS), researchers have provided a direct quantitative measurement of phonon lifetimes in a clathrate, offering a novel picture of thermal conductivity in...

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.

However, the modal phonon transmission coefficients across these geometrically irregular nanostructures and the effect of nanostructure geometry on thermal transport has not been fully understood.

The latest investigations on the thermal properties of silicon, the most common material in electronics, micro - and nano - electro - mechanical systems (MEMS and NEMS) and photonics, have pointed to nanostructuring as a highly efficient approach to acoustic phonon engineering [1 - 3].

Progress in the last few decades in nano - scale thermal transport has enabled a significant degree of control over heat and sound propagation by lattice vibrations - phonons.

We find that the divergence of the thermal expansion coefficients near the phase transition in GeTe is induced by acoustic phonon coupling to soft TO modes.

THE 2012 KAVLI PRIZE IN NANOSCIENCE is awarded to Mildred Dresselhaus «for her pioneering contributions to the study of phonons, electron - phonon interactions, and thermal transport in nanostructures.»

Professor Arne Skjeltorp, of the University of Oslo, and chairman of the Kavli Nanoscience Prize Committee, said that, while an award could have been made for Professor Dresselhaus» work in the field as a whole, members of the committee wanted to honor her for her specific advances in the study of phonons, electron - phonon interactions, and thermal transport in nanostructures.

Professor Arne Skjeltorp, of the University of Oslo, and chairman of the Kavli Nanoscience Prize Committee, said that, while an award could have been made for Professor Dresselhaus» work in the field as a whole, members of the committee wanted to honour her for her specific advances in the study of phonons, electron - phonon interactions and thermal transport in nanostructures.

The lyrics tell a story of how researchers at MIT's S3TEC center want to harness thermal energy for electricity generation, but must find a way to «stop the phonons from giving away...

The Kavli Prize in Nanoscience is given to Mildred S. Dresselhaus, Massachusetts Institute of Technology, USA, «for her pioneering contributions to the study of phonons, electron - phonon interactions, and thermal transport in nanostructures.»

«for her pioneering contributions to the study of phonons, electron - phonon interactions, and thermal transport in nanostructures»