Optical spectroscopy shows spectral weight moves from below 0.4 eV to 0.8 to 1.5 eV across the CDW transition in FeGe, attributed to Ge1 distortion and a Hund-coupling-driven spin-state change.
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Optical evidence of the band reconstruction during the charge-density wave transition in annealed Kagome magnet FeGe
Optical spectroscopy shows spectral weight moves from below 0.4 eV to 0.8 to 1.5 eV across the CDW transition in FeGe, attributed to Ge1 distortion and a Hund-coupling-driven spin-state change.