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Researchers discovered a significant anomalous Hall effect in the magnetic material SrCo6O11 at temperatures above its magnetic transition, where it exhibits a phenomenon known as the “Spin-Fluctuating Devil’s Staircase.” This observation could revolutionize the design of materials for magneto-thermoelectric conversion, impacting the development of new thermoelectric materials.

Here’s a bit of background: When an electric current flows through a metal sample in a magnetic field, it experiences the Lorentz force. This force generates a voltage perpendicular to the magnetic field and current—a phenomenon referred to as the Hall effect.

In magnetic metals, a similar phenomenon—known as the anomalous Hall effect—may occur independently of an external magnetic field, particularly in ferromagnetic materials wherein electron spins are aligned. Generally, this alignment—and thus the anomalous Hall effect—only manifests below a certain temperature, known as the magnetic transition temperature.

Scientists sifting through six billion particle smashups detect roughly 16 “antihyperhydrogen-4” particles, the heaviest antimatter nucleus discovered to date.

A groundbreaking discovery of the heaviest antimatter nucleus yet has been made at the RHIC, involving an antiproton, two antineutrons, and an antihyperon. This research aids in understanding why matter dominates the universe and confirms the fundamental properties of antimatter, suggesting no significant differences in particle decay rates compared to matter.

Discovery of a new antimatter nucleus.

For decades, extremal black holes were considered mathematically impossible. A new proof reveals otherwise.

The brain-computer interface offers real-time feedback to boost rehab adherence.

Rehabilitation robots could help patients in the future by reading their neural activity via a headset.

Continue reading “Brainwave-reading robot ‘coaches’ could rehabilitate stroke survivors” »

For more than 20 years, quantum researchers have wondered whether a quantum system can have maximum entanglement in the presence of noise. A mathematician from Spain recently answered the question: No.

The distribution of outermost shell electrons, known as valence electrons, of organic molecules was experimentally observed for the first time by a team led by Nagoya University in Japan. As the interactions between atoms are governed by the valence electrons, their findings shine light on the fundamental nature of chemical bonds, with implications for pharmacy and chemical engineering. The results were published in the Journal of the American Chemical Society.

Imagine owning a camera so powerful it can take freeze-frame photographs of a moving electron—an object traveling so fast it could circle the Earth many times in a matter of a second. Researchers at the University of Arizona have developed the world’s fastest electron microscope that can do just that.

Scientists studying the tracks of particles streaming from six billion collisions of atomic nuclei at the Relativistic Heavy Ion Collider (RHIC)—an “atom smasher” that recreates the conditions of the early universe—have discovered a new kind of antimatter nucleus, the heaviest ever detected. Composed of four antimatter particles—an antiproton, two antineutrons, and one antihyperon—these exotic antinuclei are known as antihyperhydrogen-4.

The researchers originally thought the lithium would be best housed in a “metal box” with an opening at the top. The plasma would flow into the gap so the lithium could dissipate the heat of the plasma before reaching the metal walls. Now, the researchers say a cave—geometrically just the inner half of a box—full of lithium vapor would be simpler than a box. The difference is more than just semantics: It impacts where the lithium travels and how effectively it dissipates heat.

“For years, we thought we needed a full, four-sided box, but now we know we can make something much simpler,” said Emdee. Data from new simulations pointed them in a different direction when the research team realized they could contain the lithium just as well if they cut their box in half. “Now we call it the cave,” Emdee said.

In the cave configuration, the device would have walls on the top, bottom and side closest to the center of the tokamak. This optimizes the path for the evaporating lithium, setting it on a better course for capturing the most heat from the private flux region while minimizing the complexity of the device.