Quantum particles in imperfect or quasiperiodic environments may spread, become localized, or enter critical states with fractal wave functions. These behaviors can combine into seven fundamental localization phases, but a unified framework for all of them has been missing. A team led by Prof. Xiong-Jun Liu at Peking University has now developed a generic spin-1/2 quasiperiodic system that captures all the fundamental phases, proves three theorems, constructs new exactly solvable models, and proposes the implementation with ultracold atoms in optical Raman lattices.

What if some of the most important scientific discoveries are already hidden in data collected years ago? Researchers at Tohoku University are exploring how AI and data-driven science can reveal new insights from past experiments and scientific literature. Their review highlights how old data could help accelerate discoveries in chemistry and materials science. 

Cadmium contamination in paddy soils is a serious global food safety concern, threatening the health of millions who rely on rice as a staple. While cleaning up contaminated soil is often impractical, a team of scientists has demonstrated an effective and agronomically simple alternative: spraying rice leaves with a solution of tiny, engineered carbon dots (CDs).

In a field experiment on moderately cadmium-contaminated soil, researchers from the Beijing Academy of Agriculture and Forestry Sciences and Jiangnan University applied CDs to rice canopies. The application produced remarkable results. The higher-dose treatment not only reduced the cadmium accumulated in the rice grains by 46% but also increased the overall grain yield by 18%, all without harming the grain's nutritional quality.

Biochar, a charcoal-like substance added to soil, is widely seen as a tool for improving crop yields and locking away carbon. When added to soil, it creates a unique micro-environment known as the charosphere, where complex chemical reactions take place. A new investigation from Northwest A&F University now shows that this zone can become a hotspot for reactive oxygen species (ROS)—highly unstable molecules that can influence critical soil processes. The findings demonstrate that how biochar is produced determines the type of ROS created, with significant consequences for its ability to mitigate greenhouse gases.

The research team, led by corresponding author Hanzhong Jia, conducted controlled incubation experiments to track chemical changes in the soil immediately surrounding biochar. They produced biochar at two different pyrolysis temperatures—a lower 300°C and a higher 500°C—to see how this affected its properties. Using fluorescence imaging and electron paramagnetic resonance spectroscopy, they identified and quantified the different ROS being generated in the charosphere over time and space, linking them back to the specific particles released by each type of biochar.

In the global effort to combat climate change, soil has been recognized as the largest terrestrial carbon sink. Yet, most climate policies and carbon accounting systems focus only on the top 30 centimeters. A comprehensive new review, led by an international team of scientists from institutions including The University of Western Australia, Amity University, and Tsinghua University, explains why this surface-level view is dangerously incomplete and calls for a fundamental shift in how we manage the massive carbon reserves stored deep within the Earth.

This extensive work synthesizes global research to build a cohesive picture of deep soil carbon—the organic matter stored below the standard sampling depth. The analysis confirms that these subsoil layers contain a colossal amount of carbon, estimated at over 850 petagrams worldwide, which accounts for 50% to 60% of the total carbon stock in the top meter of soil. By examining the sources, distribution, and stability of this carbon, the review provides a critical framework for understanding its role in long-term climate mitigation and soil health.