Bulk Electronic State of SrTiO3-δ Probed by Resonant Soft-X-Ray Emission Spectroscopy
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概要
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The bulk electronic state of SrTiO3-δ has been studied by means of soft-X-ray emission spectroscopy (SXES) and photoemission spectroscopy (PES) in the Ti $2p$ energy region. The PES spectrum shows two peaks in the energy region immediately below the Fermi level ($E_{\text{F}}$), which sites in an energy band gap. Both peaks correspond to a coherent part at $E_{\text{F}}$ and to an incoherent part at a binding energy of approximately 1.5 eV. In $t_{2g}$-resonanced SXES spectra, Raman scattering of the $\delta t_{2g}$ peak occurring near 2.0 eV arises from a $d$-$d$ transition from the occupied incoherent band to the unoccupied coherent band. The Raman shift reflects the half of the intra-atomic Coulomb energy (Udd/2).
- INSTITUTE OF PURE AND APPLIED PHYSICSの論文
- 2003-06-01
著者
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Fukushima Akiko
Institute For Solid State Physics University Of Tokyo
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Tsukamoto Takeyo
Department Of Applied Physics Faculty Of Science Science University Of Tokyo
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Shin Shik
Institute For Solid State Physics (issp) University Of Tokyo
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Yamaguchi Shu
Department Of Material Science And Engineering School Of Engineering The University Of Tokyo
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Higuchi Tohru
Department Of Applied Physics Faculty Of Science Tokyo Univ. Of Science
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Yokoyama Yoshiro
Department Of Applied Physics Tokyo University Of Science
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Yamaguchi Shu
Department of Materials Science, University of Tokyo, Tokyo 113-8656, Japan
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Fukushima Akiko
Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
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Yokoyama Yoshiro
Department of Applied Physics, Tokyo University of Science, Tokyo 162-8601, Japan
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