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Researchers have successfully developed an optical method to directly measure Berry curvature in atomically thin tungsten diselenide using ultrashort laser pulses. This breakthrough simplifies the experimental determination of quantum geometric properties that were previously accessible only through complex setups or theoretical models. The technique validates existing theories while opening new avenues for probing electron behavior at the nanoscale.
Quantum geometry of materials mapped with light, researchers say

Researchers at the Universities of Jena and Regensburg are developing an optical technique to investigate the quantum geometry of ultra-thin materials, focusing on Berry curvature—a quantity describing geometric properties of electrons. They measured Berry curvature in a one atomic layer thick layer of tungsten diselenide, using ultrashort laser pulses.
Image: Universität Jena · uni-jena.de Researchers at Friedrich Schiller University Jena and the University of Regensburg have demonstrated a new optical technique for quantifying Berry curvature, a quantum property influencing electron behavior, within a single atomic layer of tungsten diselenide. The team used…
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