Machine learning tools and experiments at the ALS enabled the identification of defect-rich regions in single-crystalline Co3Sn2S2 that link to how surface electrons move. Atom-level understanding of how the surface electronic properties of a magnetic semimetal can be tuned could guide its use in advanced technologies like spintronics and catalysis. Read more »
ALS Work Using Spectroscopy
These techniques are used to study the energies of particles that are emitted or absorbed by samples that are exposed to the light-source beam and are commonly used to determine the characteristics of chemical bonding and electron motion.
The Goldilocks of Ethylene Purification
Researchers engineered defects in boron nitride to develop a metal-free route for purifying ethylene to remove acetylene. The ALS shed light on how the engineered defects were responsible for exceptional selectivity. Read more »
Altermagnetism All the Way Down
Altermagnets are an emerging class of magnetic materials that offer the potential for energy-efficient, high-density memory chips. Researchers at Penn State, UC Santa Barbara, and the ALS demonstrated that characteristic altermagnetic band splitting in chromium antimonide is evident in thin films relevant for real-world device application. Read more »
Dynamic Surface Restructuring in Ag–Cu Boosts CO2 Conversion
Multimodal in situ x-ray experiments at the ALS revealed how copper–silver nanoparticle catalysts evolve during CO2 photoreduction. The findings, which demonstrate dynamic catalyst restructuring at the atomic level, provide crucial insights for enhancing the selectivity and efficiency of CO2 conversion into high-value chemicals. Read more » 
Ancient Asteroid Provides Evidence of Amino Acid Precursors
Researchers identified nitrogen-rich compounds in samples from the asteroid Bennu, returned to Earth by NASA’s OSIRIS-REx mission. The results support the idea that asteroids like Bennu may have delivered the essential chemical building blocks of life to Earth in the distant past. Read more »
From Magnetite to Ammonia, A New Line of Production
Ammonia is a critical ingredient in many important industrial and agricultural applications. The Haber–Bosch process is the primary process for large-scale ammonia production. A new study uses an experimental–theoretical approach to uncover how interfacial chemistry at the magnetite–water interface drives ammonia synthesis under ambient temperature and pressure. Read more »
Separating an Electron into Waves of Spin and Charge
Researchers are exploring how a thin film can host a Tomonaga–Luttinger liquid, which separates an electron’s charge and spin. The research findings could contribute to the development of ultra-compact and energy-efficient technologies. Read more »
The Quest for an Altermagnet
Researchers determine the unique electronic structure of altermagnets, which offers numerous benefits in creating energy-efficient devices based on spin-polarized electron currents. Understanding how altermagnetism works could contribute to the development of next-generation memory, logic, or sensing devices that are faster and consume less power. Read more »
Designing Quantum Materials for Future Electronics
Researchers bring theory into practice and confirm a new material’s characteristics at the ALS. The study opens new opportunities to design a substance that renders extra “handles” on the electron—not just its charge, but its spin and valley—so we can build computers that are faster, cooler, and more energy-efficient compared to traditional electronics. Read more »
Pinpointing Magnetic Mysteries and Mechanisms in a Layered Perovskite
The strontium ruthenate family has a perovskite-like structure that can assemble into different configurations, offering an ideal way to study how the physics change as the material goes from 3D to 2D. In this study, researchers revealed how electrons with different spins behave in distinct layers of a three-layer magnetic material. The results deepen the field’s understanding of how magnetism emerges in layered materials, an important concept for future magnetic technologies and quantum electronic devices. Read more »
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