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Mott behavior in KxFe2-ySe2 superconductors revealed by pump-probe spectroscopy

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Abstract

Pump-probe spectroscopic data on KxFe2-ySe2 superconductors exhibit signatures of orbital-selective Mott transition with a significant enhancement of a slow decay component alongside a decrease in oscillatory coherent-phonon signals upon raising temperature to 160 K.

© 2015 Optical Society of America

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