Researchers discover new quantum states in 2D materials

Researchers have made significant advancements in the study of quantum materials, identifying new magnetic and electronic behaviors in two-dimensional substances.

A collaborative team including the University of Central Florida, University of Notre Dame, George Mason University, and Hiroshima University confirmed altermagnetism in Co₁/₄TaSe₂, a cobalt-intercalated layered transition-metal dichalcogenide. Altermagnets combine features of ferromagnets and antiferromagnets, offering spin-polarized transport without the stray magnetic fields that cause device interference. This discovery extends altermagnetic band splitting to a new family of layered van der Waals materials.

Separately, scientists at the University of Chicago Pritzker School of Molecular Engineering discovered an unexpected quantum state in the van der Waals magnet Fe5GeTe2. The researchers observed a charge-ordered state where large groups of electrons move extremely slowly while maintaining quantum coherence. This finding deviates from previous theoretical predictions and may offer new pathways for developing advanced memory devices.