Researchers explain visible light from 2-D lead halide perovskites

24.06. 2019 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

Researchers drew attention three years ago when they reported that a two-dimensional perovskite—a material with a specific crystal structure—composed of cesium, lead and bromine emitted a strong green light. Crystals that produce light on the green spectrum are desirable because green light, while valuable in itself, can also be relatively easily converted to other forms that emit blue or red light, making it especially important for optical applications ranging from light-emitting devices to sensitive diagnostic tools.

Researchers unveil how soft materials react to deformation at molecular level

24.06. 2019 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

Before designing the next generation of soft materials, researchers must first understand how they behave during rapidly changing deformation. In a new study, researchers challenged previous assumptions regarding polymer behavior with newly developed laboratory techniques that measure polymer flow at the molecular level.

A new coating material that could help reduce thermal noise on gravity wave detector mirrors

21.06. 2019 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

A team of researchers from the University of Glasgow, the University of Strathclyde and Hobart and William Smith Colleges has developed a new coating for mirrors used on gravity detectors that is 25 times less noisy than mirror surfaces used on LIGO. In their paper published in the journal Physical Review Letters, the group describes how they made it and how well it performed during testing.

Freezing bubbles viral video inspired research now published

19.06. 2019 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

Scientific inquiry often begins with the "why."

Feeling the strain: Shear effects in magnetoelectric switching

18.06. 2019 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

The high resolution and wealth of data provided by an experiment at Diamond can lead to unexpected discoveries. The piezoelectric properties of the ceramic perovskite PMN-PT (0.68Pb(Mg1/3Nb2/3)O3–0.32PbTiO3) are widely used in commercial actuators, where the strain that is generated varies continuously with applied voltage. However, if the applied voltage is cycled appropriately then there are discontinuous changes of strain. These discontinuous changes can be used to drive magnetic switching in a thin overlying ferromagnet, permitting magnetic information to be written electrically. An international team of researchers used beamline I06 to investigate a ferromagnetic film of nickel when it served as a sensitive strain gauge for single-crystal PMN-PT. Their initial interpretation of the results suggested that ferroelectric domain switching rotated the magnetic domains in the film by the expected angle of 90°, but a closer examination revealed the true picture to be more complex.

A device emerges from the fusion of IGZO and ferroelectric-HfO2

18.06. 2019 Semiconductor Technology News - Semiconductor News, Semiconductors, Semiconductor Technology

As a part of JST PRESTO program, Associate professor Masaharu Kobayashi, Institute of Industrial Science, the University of Tokyo, has developed a ferroelectric FET (FeFET) with ferroelectric-HfO2 and ultrathin IGZO channel. Nearly ideal subthreshold swing (SS) and mobility higher than poly-silicon channel have been demonstrated.

Researchers solve mystery of how gas bubbles form in liquid

17.06. 2019 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

The formation of air bubbles in a liquid appears very similar to its inverse process, the formation of liquid droplets from, say, a dripping water faucet. But the physics involved is actually quite different, and while those water droplets are uniform in their size and spacing, bubble formation is typically a much more random process.

Researchers solve mystery of how gas bubbles form in liquid

17.06. 2019 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

The formation of air bubbles in a liquid appears very similar to its inverse process, the formation of liquid droplets from, say, a dripping water faucet. But the physics involved is actually quite different, and while those water droplets are uniform in their size and spacing, bubble formation is typically a much more random process.

A simple formula that could be useful for air purification, space propulsion, and molecular analyses

17.06. 2019 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

When a raindrop falls through a thundercloud, it is subject to strong electric fields that pull and tug on the droplet, like a soap bubble in the wind. If the electric field is strong enough, it can cause the droplet to burst apart, creating a fine, electrified mist.

A simple formula that could be useful for air purification, space propulsion, and molecular analyses

17.06. 2019 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

When a raindrop falls through a thundercloud, it is subject to strong electric fields that pull and tug on the droplet, like a soap bubble in the wind. If the electric field is strong enough, it can cause the droplet to burst apart, creating a fine, electrified mist.

Phase-change materials from smartphones may lead to higher data storage, energy efficiency

14.06. 2019 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

Phase-change materials that are used in the latest generation of smartphones could lead to higher storage capability and more energy efficiency. Data is recorded by switching between glassy and crystalline material states by applying a heat pulse. However, to date it has not been possible to study what happens at the atomic level during this process.

Jam-packed: A novel microscopic approach to amorphous solids

06.06. 2019 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

A team led by The University of Tokyo developed a new method for understanding the structural organization of disordered collections of soft discs or spheres using a new approach: putting a focus on local mechanical properties that is fundamentally different from previous approaches to ordered crystals and disordered amorphous solids. In particular, the researchers focused packings resulted from the phenomenon of "jamming," in which a free-flowing substance suddenly clogs as the density increases. The work may help with the design of more efficient industrial materials that are less likely to breakdown under external load.

Dynamic compression provides new insight into understanding and predicting crystal growth

05.06. 2019 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

Crystal growth is a crucial issue for fundamental science and wide applications. The growth morphology and speed are generally determined by an interplay between macroscopic thermodynamic driving forces and the microscopic kinetic process at crystal-liquid interface.

Germany’s Infineon to buy Cypress in 9-bn-euro deal

03.06. 2019 Semiconductor Technology News - Semiconductor News, Semiconductors, Semiconductor Technology

With an offer to take over US competitor Cypress for around nine billion euros ($10.1 billion), German chipmaker Infineon aimed Monday to grab the number-eight spot in the industry and expand into the "Internet of Things".

Jumping drops get boost from gravity

28.05. 2019 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

A decade ago a new idea was brought into the general scientific community—shedding water from condensers was more efficient by using surface tension to make microscopic water droplets "jump" off the surface. The idea took the research community by storm.