Ferrimagnets are a special type of magnet where different atoms’ magnetic moments partially cancel each other out, creating a rich internal structure. They are widely used in technologies from magneto-optical devices to spin-based electronics.
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Shining a light on dark valleytronics: First direct observation of dark excitons in atomically thin materials
In a world-first, researchers from the Femtosecond Spectroscopy Unit at the Okinawa Institute of Science and Technology (OIST) have directly observed the evolution of the elusive dark excitons in atomically thin materials, laying the foundation for new breakthroughs in both classical and quantum information technologies.
Their findings have been published in Nature Communications.
Professor Keshav Dani, head of the unit, says, Dark excitons have great potential as information carriers, because they are inherently less likely to interact with light, and hence less prone to degradation of their quantum properties. However, this invisibility also makes them very challenging to study and manipulate.
Preserving particle physics data ensures future discoveries from collider experiments
A lot of the science from our accelerators is published long after collisions end, so storing experimental data for future physicists is crucial.
About a billion pairs of particles collide every second within the Large Hadron Collider (LHC). With them, a petabyte of collision data floods the detectors and pours through highly selective filters, known as trigger systems. Less than 0.001% of the data survives the process and reaches the CERN Data Center, to be copied onto long-term tape.
This archive now represents the largest scientific data set ever assembled. Yet, there may be more science in it than we can extract today, which makes data preservation essential for future physicists.
Topology reveals the hidden rules of amorphous materials: Softness arises from hierarchical structures
Why do glass and other amorphous materials deform more easily in some regions than in others? A research team from the University of Osaka, the National Institute of Advanced Industrial Science and Technology (AIST), Okayama University, and the University of Tokyo has uncovered the answer.
By applying a mathematical method known as persistent homology, the team demonstrated that these soft regions are governed by hidden hierarchical structures, where ordered and disordered atomic arrangements coexist.
Crystalline solids, such as salt or ice, have atoms neatly arranged in repeating patterns. Amorphous materials, including glass, rubber, and certain plastics, lack this long-range order. However, they are not completely random: they possess medium-range order (MRO), subtle atomic patterns that extend over a few nanometers.
A new twist on Heisenberg’s uncertainty principle can sharpen quantum sensors
For almost a century, Heisenberg’s uncertainty principle has stood as one of the defining ideas of quantum physics: a particle’s position and momentum cannot be known at the same time with absolute precision. The more you know about one, the less you know about the other.
In a new study published in Science Advances, our team demonstrates how to work around this restriction, not by breaking physics but by reshaping uncertainty itself.
The result is a breakthrough in the science of measurement that could power a new generation of ultra-precise quantum sensors operating at the scale of atoms.
Gradient-doped crystal design enhances laser performance in dual-end pumping configuration
Recently, the research groups led by Prof. Zhang Qingli and Prof. Jiang Haihe from Hefei institutes of Physical Science (HFIPS) of Chinese Academy of Sciences (CAS) have jointly developed a high-symmetry gradient-doped Nd:YAG laser crystal designed for dual-end pumping configurations. This innovation significantly mitigates thermal effects and enhances laser performance.
Astronomers Spot “Impossible” Fifth Image Unlocking Dark Matter Secrets
Astronomers studying a rare Einstein Cross stumbled upon an impossible “fifth image” that shouldn’t exist — and it revealed something extraordinary.
Careful analysis showed the strange light pattern could only be explained by the presence of a vast, hidden halo of dark matter bending the galaxy’s glow.
Discovery of a Cosmic Anomaly.
