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• W1995195366 abstract "We have studied metal-insulator transition (MIT) of Y1−xCaxTiO3 (x=0.37, 0.39 and 0.41) single crystals and a Kondo semiconductor Ce3Bi4Pt3 single crystal by temperature-dependent high-resolution photoemission spectroscopy. At the phase boundary between insulating and metallic states of Y1−xCaxTiO3 (x∼0.4), an unusual temperature-dependent spectral-weight redistribution has been observed. The x=0.39 compound showed a clear MIT at ∼150 K: a finite spectral weight at EF appears below ∼150 K. A narrow V-shaped pseudogap is formed in the conduction band of Ce3Bi4Pt3 below a characteristic temperature Tcoh∼100 K. The spectral weight of the Ce 4f state at EF increases above Tcoh on cooling, but reduces significantly below Tcoh forming a V-shaped pseudogap. It is a clear evidence for the crossover from an incoherent state above Tcoh to a coherent state below Tcoh. In these materials, electron correlation and intersite-hybridization interactions (or a bandwidth) are both important for the temperature-dependent MIT." @default.
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• W1995195366 date "2001-03-01" @default.
• W1995195366 modified "2023-09-25" @default.
• W1995195366 title "Temperature-dependent metal-insulator transition in d- and f-electron systems studied by high-resolution photoemission spectroscopy" @default.
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• W1995195366 doi "https://doi.org/10.1016/s0368-2048(00)00319-4" @default.
• W1995195366 hasPublicationYear "2001" @default.
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