Scientists discovered a new Hall effect driven by spin currents in noncollinear antiferromagnets, offering a path to more efficient and resilient spintronic devices.
A research team led by Colorado State University graduate student Luke Wernert and Associate Professor Hua Chen has identified a previously unknown type of Hall effect that could lead to more energy-efficient electronic devices.
Their study, published in Physical Review Letters.
Scientists in China have created the most complex 2D microprocessor yet, featuring nearly 6,000 transistors. The devices are made from molybdenum disulfide, a material just three atoms thick. #semiconductors
A groundbreaking discovery has rocked the field of neutrino astronomy—scientists have detected an ultra-high-energy neutrino using the KM3NeT telescope, with an energy level 16,000 times greater than the most powerful collisions at the Large Hadron Collider. These elusive “ghost particles” provid
A team of Rice University researchers has developed a new way to control light interactions using a specially engineered structure called a 3D photonic-crystal cavity. Their work, published in the journal Nature Communications, lays the foundation for technologies that could enable transformative advancements in quantum computing, quantum communication and other quantum-based technologies.
“Imagine standing in a room surrounded by mirrors,” said Fuyang Tay, an alumnus of Rice’s Applied Physics Graduate Program and first author of the study. “If you shine a flashlight inside, the light will bounce back and forth, reflecting endlessly. This is similar to how an optical cavity works—a tailored structure that traps light between reflective surfaces, allowing it to bounce around in specific patterns.”
These patterns with discrete frequencies are called cavity modes, and they can be used to enhance light-matter interactions, making them potentially useful in quantum information processing, developing high-precision lasers and sensors and building better photonic circuits and fiber-optic networks. Optical cavities can be difficult to build, so the most widely used ones have simpler, unidimensional structures.
Imagine the tiniest game of checkers in the world—one played by using lasers to precisely shuffle around ions across a very small grid.
That’s the idea behind a recent study published in the journal Physical Review Letters. A team of theoretical physicists from Colorado has designed a new type of quantum “game” that scientists can play on a real quantum computer—or a device that manipulates small objects, such as atoms, to perform calculations.
The researchers even tested their game out on one such device, the Quantinuum System Model H1 Quantum Computer developed by the company Quantinuum. The study is a collaboration between scientists at the University of Colorado Boulder and Quantinuum, which is based in Broomfield, Colorado.
The detection of dark matter, the elusive type of matter predicted to make up most of the universe’s mass, is a long-standing goal in the field of astrophysics. As dark matter does not emit, reflect or absorb light, it cannot be observed using conventional experimental methods.
A promising dark matter candidate is so-called ultralight dark matter, which consists of particles with extremely low masses. Astrophysicists have been searching for these ultralight dark matter particles using various approaches and methods, yet they have not yet been detected.
Researchers at the University of Florida recently proposed a new method for the direct detection of ultralight dark matter particles, which is based on astrometry, the precise measurement of the positions and motions of celestial objects.
A research team from the Ningbo Institute of Materials Technology and Engineering (NIMTE) of the Chinese Academy of Sciences (CAS) has proposed a hybrid transfer and epitaxy strategy, enabling the heterogeneous integration of single-crystal oxide spin Hall materials on silicon substrates for high-performance oxide-based spintronic devices.
The study is published in Advanced Functional Materials.
Spintronic devices are gaining attention as a key direction for next-generation information technologies due to their low power consumption, non-volatility, and ultra-fast operating capabilities.
In a recent study, researchers made a significant observation of the Berezinskii-Kosterlitz-Thouless (BKT) phase transition in a 2D dipolar gas of ultracold atoms. This work marks a milestone in understanding how 2D superfluids behave with long-range and anisotropic dipolar interactions. The researchers are an international team of physicists, led by Prof. Jo Gyu-Boong from the Department of Physics at the Hong Kong University of Science and Technology (HKUST).
Their findings are published in the journal Science Advances.
In conventional three-dimensional (3D) systems, phase transitions, such as ice melting into water, are governed by the spontaneous breakdown of symmetries. However, pioneering work in the 1970s predicted that two-dimensional (2D) systems could host a unique topological phase transition known as the BKT transition, where vortex-antivortex pairs drive superfluidity without conventional symmetry breaking, with interaction playing a crucial role. Since then, this phenomenon had primarily been studied in various quantum systems with only short-range isotropic contact interactions.
Researchers at the European XFEL have developed a new device for X-ray measurements at high photon energies—a so-called Laue spectrometer. It enables X-ray light with photon energies of more than 15 kiloelectronvolts to be detected with improved efficiency and highest precision.
This is important for researching technically significant materials that, for example, transport electricity without losses or ensure that chemical processes run more efficiently. The findings are published in the Journal of Synchrotron Radiation.
To unravel the secrets of the world of atoms, molecules and materials in general, scientists often use special measurement devices known as spectrometers. They work by recording the light that objects emit. From the way in which the objects do that, researchers learn a lot about the physical processes that take place in the materials.
Quantum effects like superposition and entanglement have long been seen in single particles, but physicists are on a quest to find out just how big an object can be before it loses its quantumness