Spectroscopic Studies of the Phase Transition from the Mott Insulator State to the Charge-Ordering State of κ-(ET)4[M(CN)6][N(C2H5)4]·2H2O (M = CoIII and FeIII) Salts
作者： Andrzej Łapiński , Roman Świetlik , Lahcène Ouahab , Stéphane Golhen
DOI: 10.1021/JP402027X
关键词: Crystallography 、 Tetrathiafulvalene 、 State (functional analysis) 、 Charge ordering 、 Mott insulator 、 Phase transition 、 Isostructural 、 Chemistry 、 Charge (physics) 、 Spectral line 、 Condensed matter physics
摘要: Polarized reflectivity spectra versus temperature of two isostructural charge-transfer salts κ-(ET)4[M(CN)6][N(C2H5)4]·2H2O (M = Co(III) and Fe(III)) (ET bis(ethylenedithio)tetrathiafulvalene) were studied. The electronic vibrational exhibit a drastic change at around 150 K. On the basis spectral analysis, we deduced nature phase transition. transition K is due to charge ordering; above this temperature, strong fluctuations are observed.
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