Sentences with phrase «for phonon»

Accessing the coherent heat conduction regime opens a new venue for phonon engineering.

«The simplest way for a phonon to cross an interface is by a two - phonon elastic processes: a phonon comes in, a phonon of the same frequency goes out.»

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.

Not exact matches

To suggest that anti-particles are a reference for black hole physics is a redundancy based upon antigens wavering abilities in quantum physicality's unknowable as a phonon of excitabilities fantasia.

The triangular structure must be tiny in width to make possible the «lateral confinement» of phonons needed for the effect.

The mechanism for superconductivity is hence predominantly electronic and magnetic, although weak phonon interactions may favor the state.

In order for lateral confinement to be produced, the cross section of the structure must be much smaller than the «mean free path» of a phonon, or only a few to hundreds of nanometers depending on the material, Wang said.

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.

«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.»

Professor Park Je - Geun, Associate Director of the Center for Correlated Electron Systems (CCES), within the Institute for Basic Science (IBS), and colleagues have observed, quantified and created a new theoretical model of the coupling of two forms of collective atomic excitation, known as magnons and phonons in crystals of the antiferromagnet manganite (Y, Lu) MnO3, a mineral made of manganese oxide and rare - earth elements called yttrium (Y) and lutetium (Lu).

«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, short - wavelength phonons play a role in thermic conduction, while long - wavelength phonons give rise to sound, which is the origin of the word («phonos» means voice in Greek).

When co-author Zhaoming Zhu, Gauthier's postdoctoral research associate, encoded information onto one of these beams, the data could be imprinted on these newly created phonons and retained for 12 billionths of a second, long enough to be transferred back to light again by shining a third laser through the fiber.

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

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.

A research team led by Kazunari Yamaura, chief researcher, Superconducting Properties Unit, National Institute for Materials Science (NIMS), Japan, and Dr. Stuart Calder and others at the Oak Ridge National Laboratory in the United States, jointly demonstrated that the strongest ever spin - phonon coupling was observed in osmium oxide synthesized for the first time in the world by NIMS in 2009.

Recent studies indicate that the stronger the spin - phonon interaction is, the more favorable it is in the development of new materials — such as a multiferroic material, for example — in which the coupling of magnetism and the lattice system has great importance.

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.

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...

Phonon Density of States (DOS) were computed by Molecular Dynamics for different regions in the 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.

The combination of temperature dependent micro-Raman and femtosecond reflectivity measurements allows for a complete decoupling of the effects of temperature, geometry, and strain on the acoustic phonon dynamics [2, 3].

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...

Dresselhaus receives the prize for her research into uniform oscillations of elastic arrangements of atoms or molecules called phonons, phonon - electron interactions and heat conductivity 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»