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berry curvature 1circular photogalvanic effect 1optical spectroscopy 1quantized optical response 1topological semimetals 1

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cond-mat.mtrl-sci2026

Quantized Photocurrents in Gapless Topological Matter

Byunghoon Kim, Tenzin Norden, Mohammad Yahyavi +17

The authors experimentally observe a quantized circular photogalvanic effect in the chiral topological semimetal Rh0.95Ni0.05Si, providing an all‑optical analogue of the quantum Ha…