Researchers saw signs of altermagnetism in thin, strained ruthenium dioxide, previously thought non-magnetic in bulk form. This finding revives the material as a candidate for spintronic devices that could be faster and more energy-efficient than today’s ferromagnet-based electronics. Read more »
ALS Work Using ARPES
Angle-resolved photoemission spectroscopy (ARPES) is a technique in which a highly focused beam of x-rays is used to kick electrons out of the sample. By analyzing the ejected electrons' direction and energy, the researchers can obtain the material's band structure—a map of the electrons' behavior in the material.
Hidden State Precedes Superconductivity in Kagome Metal
Experiments at the ALS revealed a hidden electronic phase that breaks time-reversal symmetry before a charge-density wave forms in a kagome metal. Because hidden electronic order can compete with or shape superconductivity, this finding helps guide the search for high-temperature, unconventional superconducting materials. Read more »
Revealing the Electronic Signature of Unusual Magnetism
Experiments at the ALS showed how magnetic Co atoms sandwiched between TaS2 layers reshape the material’s electronic structure. Understanding how unusual magnetic order influences electron movements in new quantum material CoxTaS2 could guide its use in advanced quantum technologies based on spintronics and valleytronics. Read more »
Local Disorder Impacts a Quantum Material’s Electronic States
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 »
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 »
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 » 
A New Twist for Superconductivity in Bilayer Graphene
In a study of twisted bilayer graphene (TBG) systems, researchers found intriguing spectroscopic features in a superconducting “magic-angle” TBG—features that are absent in non-superconducting TBG. The results provide crucial information on superconductivity in magic-angle TBG for next-gen electronics and advanced energy technologies. Read more »
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