A team of researchers from Rice and collaborators have found a way to make two different phonons in thin films of lead halide perovskite interact with light so strongly that they merge into entirely new hybrid states of matter.

Low nitrogen availability is the number one limitation to plant growth in most ecosystems. Plants in the bean family and other closely related families evolved a symbiotic relationship with bacteria capable of acquiring nitrogen from the air, where it is abundant. Scientists want to genetically engineer crop plants to do the same. Results from a new study bring them a step closer to their goal. 

University at Buffalo researchers are theorizing that core electron bonding may not always require as much pressure as previously thought. In fact, for some elements, it may only take the atmospheric pressure you’re experiencing right now on the Earth’s surface. 

Programmable photonics promises faster, more energy-efficient computing than electronics by transmitting signals using light. However, current systems are limited by the need for precise on-chip power monitors. Now, researchers have developed a germanium-implanted silicon waveguide photodiode that overcomes a long-standing tradeoff in performance. Their device achieved high responsivity, low optical loss, and minimal dark current, putting us one step closer to practical programmable photonics.

Air quality in America’s largest cities has steadily improved thanks to tighter regulations. However, increased heat, wildfire smoke and other emerging global drivers of urban aerosol pollution are now combining to create a new set of challenges on the East Coast. Research from Colorado State University published in npj Climate and Atmospheric Science begins to unpack and characterize these developing relationships against the backdrop of New York City.

Quantum metals are metals where quantum effects—behaviors that normally only matter at atomic scales—become powerful enough to control the metal's macroscopic electrical properties. 

Researchers in Japan have explained how electricity behaves in a special group of quantum metals called kagome metals. The study is the first to show how weak magnetic fields reverse tiny loop electrical currents inside these metals. This switching changes the material's macroscopic electrical properties and reverses which direction has easier electrical flow, a property known as the diode effect, where current flows more easily in one direction than the other.  

Notably, the research team found that quantum geometric effects amplify this switching by about 100 times. The study, published in Proceedings of the National Academy of Sciences, provides the theoretical foundation that could eventually lead to new electronic devices controlled by simple magnets.