Systematic change of spectral function observed by controlling electron correlation in Ca1-xSrxVO3 with fixed 3d1 configuration.

I. H. Inoue; I. Hase; Y. Aiura; A. Fujimori; K. Morikawa; T. Mizokawa; Y. Haruyama; T. Maruyama; Y. Nishihara

doi:10.1016/0921-4534(94)91728-0

Systematic change of spectral function observed by controlling electron correlation in Ca_1-xSr_xVO₃ with fixed 3d¹ configuration.

I. H. Inoue^*, I. Hase, Y. Aiura, A. Fujimori, K. Morikawa, T. Mizokawa, Y. Haruyama, T. Maruyama, Y. Nishihara

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

By using ultra-violet photoemission spectroscopy (UPS) and soft x-ray absorption spectroscopy (XAS), we have observed a systematic change of the spectral function around the Fermi level in the perovskite-type conductive 3d¹ system, Ca_1-xSr_xVO₃. When we decrease the Sr concentration (x) from 1 to 0 in Ca_1-xSr_xVO₃, UPS and XAS intensities near the Fermi level decrease, and the reduced spectral weight is transferred to high energy part about 2 eV below and above Fermi level. The high energy features are thought to correspond to the remnants of lower and upper Hubbard bands, and the spectral weight within ∼1eV of Fermi level is assigned to the quasiparticle excitations or renormalized 3d-band. That is, the observed systematic spectral change indicates the opening of Mott-Hubbard gap.

Original language	English
Pages (from-to)	1007-1008
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	235-240
Issue number	PART 2
DOIs	https://doi.org/10.1016/0921-4534(94)91728-0
Publication status	Published - 1994 Dec
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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Inoue, I. H., Hase, I., Aiura, Y., Fujimori, A., Morikawa, K., Mizokawa, T., Haruyama, Y., Maruyama, T., & Nishihara, Y. (1994). Systematic change of spectral function observed by controlling electron correlation in Ca_1-xSr_xVO₃ with fixed 3d¹ configuration. Physica C: Superconductivity and its applications, 235-240(PART 2), 1007-1008. https://doi.org/10.1016/0921-4534(94)91728-0

Inoue, IH, Hase, I, Aiura, Y, Fujimori, A, Morikawa, K, Mizokawa, T, Haruyama, Y, Maruyama, T & Nishihara, Y 1994, 'Systematic change of spectral function observed by controlling electron correlation in Ca_1-xSr_xVO₃ with fixed 3d¹ configuration.', Physica C: Superconductivity and its applications, vol. 235-240, no. PART 2, pp. 1007-1008. https://doi.org/10.1016/0921-4534(94)91728-0

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title = "Systematic change of spectral function observed by controlling electron correlation in Ca1-xSrxVO3 with fixed 3d1 configuration.",

abstract = "By using ultra-violet photoemission spectroscopy (UPS) and soft x-ray absorption spectroscopy (XAS), we have observed a systematic change of the spectral function around the Fermi level in the perovskite-type conductive 3d1 system, Ca1-xSrxVO3. When we decrease the Sr concentration (x) from 1 to 0 in Ca1-xSrxVO3, UPS and XAS intensities near the Fermi level decrease, and the reduced spectral weight is transferred to high energy part about 2 eV below and above Fermi level. The high energy features are thought to correspond to the remnants of lower and upper Hubbard bands, and the spectral weight within ∼1eV of Fermi level is assigned to the quasiparticle excitations or renormalized 3d-band. That is, the observed systematic spectral change indicates the opening of Mott-Hubbard gap.",

author = "Inoue, {I. H.} and I. Hase and Y. Aiura and A. Fujimori and K. Morikawa and T. Mizokawa and Y. Haruyama and T. Maruyama and Y. Nishihara",

year = "1994",

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doi = "10.1016/0921-4534(94)91728-0",

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AU - Inoue, I. H.

AU - Hase, I.

AU - Aiura, Y.

AU - Fujimori, A.

AU - Morikawa, K.

AU - Mizokawa, T.

AU - Haruyama, Y.

AU - Maruyama, T.

AU - Nishihara, Y.

PY - 1994/12

Y1 - 1994/12

N2 - By using ultra-violet photoemission spectroscopy (UPS) and soft x-ray absorption spectroscopy (XAS), we have observed a systematic change of the spectral function around the Fermi level in the perovskite-type conductive 3d1 system, Ca1-xSrxVO3. When we decrease the Sr concentration (x) from 1 to 0 in Ca1-xSrxVO3, UPS and XAS intensities near the Fermi level decrease, and the reduced spectral weight is transferred to high energy part about 2 eV below and above Fermi level. The high energy features are thought to correspond to the remnants of lower and upper Hubbard bands, and the spectral weight within ∼1eV of Fermi level is assigned to the quasiparticle excitations or renormalized 3d-band. That is, the observed systematic spectral change indicates the opening of Mott-Hubbard gap.

AB - By using ultra-violet photoemission spectroscopy (UPS) and soft x-ray absorption spectroscopy (XAS), we have observed a systematic change of the spectral function around the Fermi level in the perovskite-type conductive 3d1 system, Ca1-xSrxVO3. When we decrease the Sr concentration (x) from 1 to 0 in Ca1-xSrxVO3, UPS and XAS intensities near the Fermi level decrease, and the reduced spectral weight is transferred to high energy part about 2 eV below and above Fermi level. The high energy features are thought to correspond to the remnants of lower and upper Hubbard bands, and the spectral weight within ∼1eV of Fermi level is assigned to the quasiparticle excitations or renormalized 3d-band. That is, the observed systematic spectral change indicates the opening of Mott-Hubbard gap.

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Systematic change of spectral function observed by controlling electron correlation in Ca_1-xSr_xVO₃ with fixed 3d¹ configuration.

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