Sentences with phrase «phonon transport»

Calculation of Phonon transport through molecular junctions between graphene sheets via Green's functions technique through DFTB

Phonon properties have been studied by Green's functions phonon transport method through Density Functional based Tight Binding theory, implemented into DFTB package.

In superlattice structures, ballistic phonon transport across the whole thickness of the superlattices implies phase coherence.

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 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.

Furthermore, the phonon transport in MnGe nanoinclusions embedded in Ge matrix and MnGe / Ge superlattices were also studied.

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.

Not exact matches

Until now, heat transport in nanostructured materials has largely been controlled by introduction of atomic - scale impurities, interfaces, surfaces and nanoparticles that reduce heat flow by scattering the phonons diffusely.

The transport of heat in amorphous silicon is determined by the behavior of phonons in the material.

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

«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.»

That's when the phonon is transported from the generator to the detector.

However, the new research shows that phonons can reach across a gap as small as a nanometer, «tunneling» from one material to another to enhance heat transport.

While atomic vibrations, or phonons, typically can not transport heat across distances larger than a few atoms, the team found that the atoms» summed electromagnetic force can create a «bridge» for phonons to cross.

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.

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.

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.

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.

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 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»