Orbital state and metal-insulator transition in Ca2-xSr xRuO4 (x=0.0 and 0.09) studied by x-ray absorption spectroscopy

T. Mizokawa; L. H. Tjeng; H. J. Lin; C. T. Chen; S. Schuppler; S. Nakatsuji; H. Fukazawa; Y. Maeno

doi:10.1103/PhysRevB.69.132410

Orbital state and metal-insulator transition in Ca_2-xSr _xRuO₄ (x=0.0 and 0.09) studied by x-ray absorption spectroscopy

T. Mizokawa^*, L. H. Tjeng, H. J. Lin, C. T. Chen, S. Schuppler, S. Nakatsuji, H. Fukazawa, Y. Maeno

^*この研究の対応する著者

研究成果: Article › 査読

16 被引用数 (Scopus)

抄録

The nature of metal-insulator (MI) transition in a t_2g-electron system Ca_2-xSr_xRuO₄ has been investigated using O 1s x-ray absorption spectroscopy (XAS). The O 1s XAS data strongly depend on temperature and demonstrate that the hysteresis of the MI transition is accompanied by the hysteresis of the orbital change. An unrestricted Hartree-Fock analysis indicates that the amount of yz/zx hole is discontinuously reduced at the MI transition. In the insulating phase, the amount of 4d yz/zx hole gradually decreases on heating, suggesting that partial orbital fluctuation increases with temperature.

本文言語	English
論文番号	132410
ページ（範囲）	132410-1-132410-4
ジャーナル	Physical Review B - Condensed Matter and Materials Physics
巻	69
号	13
DOI	https://doi.org/10.1103/PhysRevB.69.132410
出版ステータス	Published - 2004 4月 1
外部発表	はい

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
凝縮系物理学

文献へのアクセス

10.1103/PhysRevB.69.132410

他のファイルとリンク

引用スタイル

Mizokawa, T., Tjeng, L. H., Lin, H. J., Chen, C. T., Schuppler, S., Nakatsuji, S., Fukazawa, H., & Maeno, Y. (2004). Orbital state and metal-insulator transition in Ca_2-xSr _xRuO₄ (x=0.0 and 0.09) studied by x-ray absorption spectroscopy. Physical Review B - Condensed Matter and Materials Physics, 69(13), 132410-1-132410-4. [132410]. https://doi.org/10.1103/PhysRevB.69.132410

Mizokawa, T, Tjeng, LH, Lin, HJ, Chen, CT, Schuppler, S, Nakatsuji, S, Fukazawa, H & Maeno, Y 2004, 'Orbital state and metal-insulator transition in Ca_2-xSr _xRuO₄ (x=0.0 and 0.09) studied by x-ray absorption spectroscopy', Physical Review B - Condensed Matter and Materials Physics, vol. 69, no. 13, 132410, pp. 132410-1-132410-4. https://doi.org/10.1103/PhysRevB.69.132410

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abstract = "The nature of metal-insulator (MI) transition in a t2g-electron system Ca2-xSrxRuO4 has been investigated using O 1s x-ray absorption spectroscopy (XAS). The O 1s XAS data strongly depend on temperature and demonstrate that the hysteresis of the MI transition is accompanied by the hysteresis of the orbital change. An unrestricted Hartree-Fock analysis indicates that the amount of yz/zx hole is discontinuously reduced at the MI transition. In the insulating phase, the amount of 4d yz/zx hole gradually decreases on heating, suggesting that partial orbital fluctuation increases with temperature.",

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AU - Tjeng, L. H.

AU - Lin, H. J.

AU - Chen, C. T.

AU - Schuppler, S.

AU - Nakatsuji, S.

AU - Fukazawa, H.

AU - Maeno, Y.

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AB - The nature of metal-insulator (MI) transition in a t2g-electron system Ca2-xSrxRuO4 has been investigated using O 1s x-ray absorption spectroscopy (XAS). The O 1s XAS data strongly depend on temperature and demonstrate that the hysteresis of the MI transition is accompanied by the hysteresis of the orbital change. An unrestricted Hartree-Fock analysis indicates that the amount of yz/zx hole is discontinuously reduced at the MI transition. In the insulating phase, the amount of 4d yz/zx hole gradually decreases on heating, suggesting that partial orbital fluctuation increases with temperature.

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