Metal–Insulator Transition for V2O3 Powder Observed Using a Soft X-ray Emission Spectrometer
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概要
- 論文の詳細を見る
A bulk-sensitive measurement is required in order to observe changes in the electronic states across metal–insulator transition (MIT). We have measured unoccupied and occupied electronic states for V2O3 powder above and below the MIT by O $K$ partial fluorescence yield (PFY) and soft x-ray emission spectroscopy (SXES) using a soft x-ray emission spectrometer. The PFY spectra for the metallic and insulating phases show an O $K$ edge shift of ${\sim}0.5$ eV and a change in intensity near the edge. The SXES spectra excited by the incident photon energy near the O $K$ threshold also show a spectral change above and below the MIT. This study shows that the soft x-ray spectrometer allows us to measure the bulk electronic states of powder samples where surface cleaning is difficult.
- 2010-05-15
著者
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Zheng Xu-guang
Department Of Electronics Faculty Of Engineering Kyushu University
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Ishiwata Yoichi
Department Of Mechanical Engineering Science University Of Tokyo
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Suehiro Satoshi
Department Of Neurosurgery Uwajima City Hospital
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Tezuka Yasuhisa
Department of Advanced Physics, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
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Ishiwata Yoichi
Department of Physics, Saga University, Saga 840-8502, Japan
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Morimoto Osamu
Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashihiroshima, Hiroshima 739-0046, Japan
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Suehiro Satoshi
Department of Physics, Saga University, Saga 840-8502, Japan
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Soi Yasuyuki
Department of Physics, Saga University, Saga 840-8502, Japan
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Zheng Xu-Guang
Department of Physics, Saga University, Saga 840-8502, Japan
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- Metal–Insulator Transition for V2O3 Powder Observed Using a Soft X-ray Emission Spectrometer