Ti 3d Orbital Change Across Metal–Insulator Transition in Ti2O3: Polarization-Dependent Soft X-ray Absorption Spectroscopy at Ti 2p Edge
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- Sato Hitoshi
- Hiroshima Synchrotron Radiation Center, Hiroshima University
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- Tanaka Arata
- ADSM, Hiroshima University
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- Sawada Masahiro
- Hiroshima Synchrotron Radiation Center, Hiroshima University
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- Iga Fumitoshi
- ADSM, Hiroshima University
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- Tsuji Kenichio
- Graduate School of Science, Hiroshima University
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- Tsubota Masami
- ADSM, Hiroshima University
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- Takemura Masaki
- ADSM, Hiroshima University
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- Yaji Koichiro
- Graduate School of Science, Hiroshima University
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- Nagira Mirai
- Graduate School of Science, Hiroshima University
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- Kimura Akio
- Graduate School of Science, Hiroshima University
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- Takabatake Toshiro
- ADSM, Hiroshima University
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- Namatame Hirofumi
- Hiroshima Synchrotron Radiation Center, Hiroshima University
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- Taniguchi Masaki
- Hiroshima Synchrotron Radiation Center, Hiroshima University Graduate School of Science, Hiroshima University
Bibliographic Information
- Other Title
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- Ti 3<i>d</i>Orbital Change Across Metal–Insulator Transition in Ti<sub>2</sub>O<sub>3</sub>: Polarization-Dependent Soft X-ray Absorption Spectroscopy at Ti 2<i>p</i>Edge
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Abstract
The Ti 3d electronic structure of Ti2O3 across metal–insulator transition (MIT) has been investigated by means of polarization-dependent soft X-ray absorption spectroscopy (XAS) at the Ti 2p edge. The XAS spectra exhibit a remarkable linear dichroism (LD) between the polarization vectors of the incident light parallel and perpendicular to the Ti ion pair along the c-axis. LD intensity is significantly reduced at 520 K in the metallic phase in comparison with that at 300 K in the insulating phase, indicating a large change in a1g and egπ orbital occupations. The results are qualitatively consistent with a recent theory, where the MIT is due to the change of the 3d electronic configuration in the Ti pair along the c-axis driven by a change in the t2g level splitting relative to the on-site exchange interaction.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 75 (5), 053702-, 2006
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390282679167100672
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- NII Article ID
- 110004702311
- 210000106133
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- NII Book ID
- AA00704814
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- BIBCODE
- 2006JPSJ...75e3702S
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 7907950
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed