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- W2313374057 abstract "Pressure-induced valence change and semiconductor–metal transition were revealed in perovskite compound PbCrO3 by X-ray absorption spectroscopy (XAS) and resistance measurements, respectively. The Cr L2,3 edge XAS spectra indicate a charge disproportionation of Cr (3Cr4+ → 2Cr3+ + Cr6+) at ambient pressure, suggesting that the ambient-pressure phase of PbCrO3 has complex local structure and cannot be explained using the simple cubic perovskite structure (Pm-3m). Upon compression up to 4.2 GPa, Cr3+ and Cr6+ ions were converted to Cr4+ via charge transfer, associated with semiconductor–metal transition. The high-pressure metal phase is determined to be cubic perovskite structure (Pm-3m). Compared with the previous X-ray diffraction experiment, the large volume collapse (∼9.8% at 1.6 GPa) may be related to valence change and semiconductor–metal transition." @default.
- W2313374057 created "2016-06-24" @default.
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- W2313374057 date "2014-09-24" @default.
- W2313374057 modified "2023-10-18" @default.
- W2313374057 title "Pressure-Induced Valence Change and Semiconductor–Metal Transition in PbCrO<sub>3</sub>" @default.
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- W2313374057 doi "https://doi.org/10.1021/jp5072346" @default.
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