Physics

Scientists elevate quantum dot solar cell world record

Researchers have established a new world efficiency record for quantum dot solar cells, at 13.4 percent.

Research yields significant thermoelectric performance

Scientists at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) reported significant advances in the thermoelectric performance of organic semiconductors based on carbon nanotube thin films that could be integrated into fabrics to convert waste heat into electricity or serve as a small power source.

How electromagnetism haunts our everyday life

Electromagnetism has haunted the human imagination for thousands of years. From the ghostly Northern Lights of ancient aurora mythology to the evil electromagnetic forces in the popular TV show Twin Peaks, electromagnetic energy continues to endure as a source of spooky speculation. Its mystical fields and mysterious frequencies have inspired spiritualists, New Agers, paranormal investigators and conspiracy theorists alike.

Opening the Van der Waals' sandwich

Eighty years after the theoretical prediction of the force required to overcome the van der Waals' bonding between layers in a crystal, engineering researchers have measured it directly.

Intricate beauty of a cracked glass

Typical crack speeds in glass easily surpass a kilometer per second, and broken surface features may be well smaller than a millimeter, so the processes that generate these patterns have been largely a mystery. Now, by replacing hard glass with soft but brittle gels, researchers have slowed down the cracks that precipitate fracture to mere meters per second, and unraveled the complex physical processes that take place during fracture in microscopic detail and in real time.

Open-source software for data from high-energy physics

Most of the universe is dark, with dark matter and dark energy comprising more than 95 percent of its mass-energy. Yet we know little about dark matter and energy. To find answers, scientists run huge high-energy physics experiments. Analyzing the results demands high-performance computing – sometimes balanced with industrial trends.

LHC reaches 2017 targets ahead of schedule

Today, CERN Control Centre operators announced good news, the Large Hadron Collider (LHC) has successfully met its production target for 2017, delivering more than 45 inverse femtobarns to the experiments.

The influence of a magnetic field on chiral magnetic correlations

Chiral magnetism attracts a great amount of attention since the observation of chiral skyrmion lattices in the reference system MnSi. These chiral skyrmions have dimensions significantly larger than the lattice constant, are topologically protected, and may have applications in spintronics and novel devices for information storage. In systems like MnSi the non-trivial behavior emerges from a relativistic effect, the Dzyaloshinsky-Moriya (DM) interaction, that twists the magnetic moments with respect to each other.

Physicists' work deepens understanding of antipolar cation motions

University of Arkansas physicists studying antipolar cation motions found new features that deepen the knowledge on this intriguing effect. The study, by physics graduate student Kinnary Patel, research professor Sergey Prosandeev and Distinguished Professor Laurent Bellaiche, was published in August in the journal npj Computational Materials.

Making glass invisible: A nanoscience-based disappearing act

By texturing glass surfaces with nanosized features, scientists almost completely eliminated surface reflections -- an achievement that could enhance solar cell efficiency, improve consumers' experience with electronic displays, and support high-power laser applications.

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