Search results for phonons

General Physics Apr 16, 2021

Scientists create mechanism to precisely control soundwaves in metamaterials

University of Oregon physicists have developed a new method to manipulate sound—stop it, reverse it, store it and even use it later—in synthetic composite structures known as metamaterials.

General Physics Apr 5, 2021

Computational tool for materials physics growing in popularity

A new piece of software developed at Caltech makes it easier to study the behavior of electrons in materials—even materials that have been predicted but do not yet exist. The software, called Perturbo, is gaining traction ...

Analytical Chemistry Apr 2, 2021

A streamlined approach to determining thermal properties of crystalline solids and alloys

In a September 2020 essay in Nature Energy, three scientists posed several "grand challenges"—one of which was to find suitable materials for thermal energy storage devices that could be used in concert with solar energy ...

Quantum Physics Mar 31, 2021

A successful phonon calculation within the quantum Monte Carlo framework

The focus and ultimate goal of computational research in materials science and condensed matter physics is to solve the Schrödinger equation—the fundamental equation describing how electrons behave inside matter—exactly ...

General Physics Mar 31, 2021

Heat conduction record with tantalum nitride

A thermos bottle has the task of preserving the temperature—but sometimes you want to achieve the opposite: Computer chips generate heat that must be dissipated as quickly as possible so that the chip is not destroyed. ...

Materials Science Mar 30, 2021

High-entropy-stabilized chalcogenides with high thermoelectric performance

Thermoelectric technology can generate electricity from waste heat, although their performance can result in a bottleneck for wider applications. Materials scientists can regulate the configurational entropy of a material ...

Nanophysics Mar 25, 2021

Exploring the nanoworld in 3D

Imagine a cube on which light is projected by a flashlight. The cube reflects the light in a particular way, so simply spinning the cube or moving the flashlight makes it possible to examine each aspect and deduce information ...

General Physics Mar 25, 2021

Scientists realize real-time GW-BSE investigations on spin-valley exciton dynamics

Prof. Zhao Jin's research team from University of Science and Technology of China (USTC) has made important progress in the development of spin-valley exciton dynamics. The research developed an ab initio nonadiabatic molecular ...

Condensed Matter Mar 23, 2021

An exotic metal-insulator transition in a surface-doped transition metal dichalcogenide

Metal-insulator transition (MIT) driven by many-body interactions is an important phenomenon in condensed matter physics. Exotic phases always emerge around the metal-insulator transition points where quantum fluctuations ...

Nanophysics Mar 23, 2021

Moiré effect: How to twist material properties

2D materials have triggered a boom in materials research. Now it turns out that exciting effects occur when two such layered materials are stacked and slightly twisted.

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