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Researchers at the University of Chicago have identified a "flat band" in Fe5GeTe2 where electrons move collectively and slowly while maintaining quantum coherence, challenging existing theoretical models for magnetic interactions. This discovery suggests potential pathways toward novel memory devices by leveraging these unique many-body phenomena without relying on high-energy electron velocities. The findings represent a significant step forward in understanding the fundamental limits of quantum states in van der Waals magnets.

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University of Chicago finds slow electrons stay quantum coherent

Quantum ZeitgeistAugust 11, 20265 min read

Researchers at the University of Chicago Pritzker School of Molecular Engineering discovered that Fe 5 GeTe 2 electrons move slowly, yet remain quantum coherent.

Researchers at the University of Chicago Pritzker School of Molecular Engineering have discovered an unusual behavior in the van der Waals magnet Fe 5 GeTe 2, a material discovered seven years ago. The team reports that electrons within the material move collectively and unusually slowly while maintaining quantum coherence, a finding that changes current knowledge of the material and unlocks new technological applications, according to Asst. Prof. Shuolong Yang. Using angle-resolved photoemission spectroscopy with a 10-micrometer ultraviolet laser, they observed a “flat band” where electrons exhibit this collective,…

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