Search results for phonons

General Physics Aug 7, 2020

Q&A: Harnessing sound to better monitor aging pipeline infrastructure

Underground pipelines, some as old as the cities they service, are often far past their intended lifespan and the need for replacing them looms as an expense most municipalities can't afford.

Nanomaterials Jul 21, 2020

Through the nanoscale looking glass: Determining boson peak frequency in ultra-thin alumina

There's more to glass than meets the eye.

Materials Science Jul 17, 2020

Pressure suppresses carrier trapping in 2-D halide perovskite

Two-dimensional (2-D) organic-inorganic halide perovskites are emerging materials for photovoltaic and optoelectronic applications due to their unique physical properties and a high degree of tunability. Despite impressive ...

Materials Science Jul 16, 2020

Silane regulates thermal conductivity of composites on molecular level

A research team from the Institute of Solid State Physics, Hefei Institutes of Physical Science has conducted a study on thermal conductivity of composites. They found that thermal conductivity (TC) of Poly(vinyl alcohol)/boron ...

Materials Science Jul 15, 2020

A new strategy to synthesize 2-D inorganic materials used in capacitors, batteries, and composites

Surface functional groups in two dimensional (2-D) transition-metal carbides can undergo versatile chemical transformations to facilitate a broad class of MXene materials. In a new report on Science, Vladislav Kamysbayev, ...

Quantum Physics Jul 14, 2020

Hammer-on technique for atomic vibrations in a crystal

Vibrations of atoms in a crystal of the semiconductor gallium arsenide (GaAs) are impulsively shifted to a higher frequency by an optically excited electric current. The related change in the spatial distribution of charge ...

General Physics Jul 7, 2020

Physics team observes extremely fast electronic changes in real time in a special material class

In physics, they are currently the subject of intensive research; in electronics, they could enable completely new functions. So-called topological materials are characterized by special electronic properties, which are also ...

Nanomaterials Jul 6, 2020

New insights into van der Waals materials found

Layered van der Waals materials are of high interest for electronic and photonic applications, according to researchers at Penn State and SLAC National Accelerator Laboratory, in California, who provide new insights into ...

General Physics Jun 23, 2020

A structural light switch for magnetism

Magnetic materials have been a mainstay in computing technology due to their ability to permanently store information in their magnetic state. Current technologies are based on ferromagnets, whose states can be flipped readily ...

General Physics Jun 23, 2020

Transferring orbital angular momentum of light to plasmonic excitations in metamaterials

The vortex beam with orbital angular momentum (OAM) is a new and ideal tool to selectively excite dipole forbidden states through linear optical absorption. The emergence of the vortex beam with OAM provides intriguing opportunities ...

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