N Matsumoto

Metal-insulator transition in the spinel CuIr2(S1−xSex)4 system studied by NMR

Abstract We have investigated the metal-insulator transition (MIT) in CuIr2(S1−xSex)4 by Cu NMR. The decreases of the nuclear spin-lattice relaxation rate, 1/T1, and of the core-polarization contribution to the Knight shift show clearly an evidence of the MIT in the range of x

In-gap state and effect of light illumination in CuIr2S4 probed by photoemission spectroscopy

We have studied disorder-induced in-gap states and effect of light illumination in the insulating phase of spinel-type

NMR studies of metal-insulator transition in spinel CuIr2(S1−xSex)4

{\text{CuIr}}_{2}{\text{S}}_{4}

Anomalous electronic transport in CuIr2S4 and CuIr2Se4

using ultraviolet photoemission spectroscopy (UPS). The

Photo-induced charge-orbital switching in transition-metal compounds probed by photoemission spectroscopy

{\text{Ir}}^{3+}/{\text{Ir}}^{4+}

Anomalous resistivity and thermopower of the spinel-type compounds CuIr 2 S 4 and CuIr 2 Se 4

charge-ordered gap appears below the metal-insulator transition temperature. However, in the insulating phase, in-gap spectral features with softgap are observed in UPS just below the Fermi level

X-ray photoemission study of CuIr2S4: Ir3+-Ir4+ charge ordering and the effect of light illumination

({E}_{F})

Two coherent phonon modes at the metal-insulator transition of the spinel CuIr 2 S 4 compound using femtosecond pump-probe spectroscopy

, corresponding to the variable range hopping transport observed in resistivity. The spectral weight at

Transport properties of Cu1−xZnxIr2S4 spinel compounds

{E}_{F}

INSTABILITY OF METALLIC PHASE IN CUIR2SE4 AT HIGH PRESSURE

is not increased by light illumination, indicating that the