Quantum hall effect goes 3D: scientists unveil new topological state in weyl semimetals
Peer-Reviewed Publication
Updates every hour. Last Updated: 20-Dec-2025 15:11 ET (20-Dec-2025 20:11 GMT/UTC)
A research team proposes a three-dimensional quantum anomalous Hall effect (3D QAHE) in Weyl semimetals (WSMs) by introducing Rashba spin-orbit coupling. This new state supports chiral surface and hinge states along different spatial directions, with Hall resistance switching between 0, h/e², and ±h/e², offering potential for energy-efficient devices and in-memory computing.
Scientists have paved the way for next-generation quantum circuits by successfully making a semiconducting element commonly used in electrical devices superconducting.
A research team from The University of Queensland and New York University have shown germanium can conduct electricity without resistance.
The discovery, which had eluded physicists for more than 60 years, unifies the building blocks of classical electronics and quantum technologies.
Under ultraviolet irradiation, water molecules can generate highly oxidative hydroxyl radicals (Ultraviolet-water/UV-W), which can scissor polymer chains. The study results reveal that by first introducing water passages into the polymer membrane and subsequently applying the UV-W process, tunable angstrom-sized channels can be created, enabling precise ion sieving.
A new study from the Technion – Israel Institute of Technology, published in Science, presents a long-term roadmap positioning porous materials as a cornerstone of future energy technologies. Led by Prof. David Eisenberg and Dr. Eliyahu Farber of the Schulich Faculty of Chemistry and the Nancy and Stephen Grand Technion Energy Program, the research highlights how porous structures—defined by the interplay between matter and empty space—govern the flow of energy in forms such as mass, electrical charge, heat, radiation, and mechanical pressure.
Porous materials already play central roles in technologies such as underground fuel extraction and battery charge conduction. According to the researchers, the next wave of innovation hinges on the intelligent design of these structures to optimize mass and charge transfer, enabling significant improvements in energy production, conversion, and storage.
By analyzing advanced and biomimetic (nature-inspired) architectures across multiple fields, the team identified trends that could shape future applications—from using porous materials to reduce power consumption in electronic chips to developing improved shock-absorbing materials for biomedical implants.
The study integrates principles that apply across all scales, from atoms to full systems, and offers generalizable models to predict energetic behavior and boost performance. These models could accelerate the development of next-generation materials for solar cells, batteries, electrochemical systems, and sustainable fuel production—advancing global energy goals.
The research was supported by the Israel Ministry of Energy and Infrastructure.