Independent control of charge and spin density in Sr1 - (x + y) Lax + y Ti1 - x Crx O3 probed by photoemission spectroscopy

S. Kaneyoshi; H. Iwasawa; T. Saitoh; Y. Aiura; D. Satoh; T. Katsufuji; I. Hase; M. Higashiguchi; K. Shimada; H. Namatame; M. Taniguchi; M. Kubota; K. Ono

doi:10.1016/j.jmmm.2006.10.400

Independent control of charge and spin density in Sr_{1 - (x + y)} La_{x + y} Ti_{1 - x} Cr_x O₃ probed by photoemission spectroscopy

S. Kaneyoshi, H. Iwasawa, T. Saitoh^*, Y. Aiura, D. Satoh, T. Katsufuji, I. Hase, M. Higashiguchi, K. Shimada, H. Namatame, M. Taniguchi, M. Kubota, K. Ono

^*Corresponding author for this work

School of Advanced Science and Engineering

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

1 Citation (Scopus)

Abstract

Using photoemission (PES) spectroscopy and a first-principles band-structure calculation, we have investigated the electronic structure of perovskite-type Ti-Cr oxides Sr_{1 - (x + y)} La_{x + y} Ti_{1 - x} Cr_x O₃, in which the charge and spin density can be controlled. It was found that the near-Fermi level (E_F) electronic structure consisted of a Cr 3d localized state and a Ti 3d itinerant state that were well separated in energy. The spectral weight of the Cr 3d state was proportional to x, demonstrating a controllable spin density. In contrast, the near-E_F spectral weight exhibited different behavior. The band theory has reproduced the essential features of the Cr and Ti 3d states as well as the O 2p ones, but failed to predict the location of the Cr 3d and O 2p states. Implications of this discrepancy have been discussed in connection with calculated magnetic moments.

Original language	English
Pages (from-to)	e278-e280
Journal	Journal of Magnetism and Magnetic Materials
Volume	310
Issue number	2 SUPPL. PART 2
DOIs	https://doi.org/10.1016/j.jmmm.2006.10.400
Publication status	Published - 2007 Mar

Keywords

Electronic structure
Photoemission spectroscopy
SrTiO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1016/j.jmmm.2006.10.400

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Kaneyoshi, S., Iwasawa, H., Saitoh, T., Aiura, Y., Satoh, D., Katsufuji, T., Hase, I., Higashiguchi, M., Shimada, K., Namatame, H., Taniguchi, M., Kubota, M., & Ono, K. (2007). Independent control of charge and spin density in Sr_{1 - (x + y)} La_{x + y} Ti_{1 - x} Cr_x O₃ probed by photoemission spectroscopy. Journal of Magnetism and Magnetic Materials, 310(2 SUPPL. PART 2), e278-e280. https://doi.org/10.1016/j.jmmm.2006.10.400

Independent control of charge and spin density in Sr_{1 - (x + y)} La_{x + y} Ti_{1 - x} Cr_x O₃ probed by photoemission spectroscopy. / Kaneyoshi, S.; Iwasawa, H.; Saitoh, T.; Aiura, Y.; Satoh, D.; Katsufuji, T.; Hase, I.; Higashiguchi, M.; Shimada, K.; Namatame, H.; Taniguchi, M.; Kubota, M.; Ono, K.

In: Journal of Magnetism and Magnetic Materials, Vol. 310, No. 2 SUPPL. PART 2, 03.2007, p. e278-e280.

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

Kaneyoshi, S, Iwasawa, H, Saitoh, T, Aiura, Y, Satoh, D, Katsufuji, T, Hase, I, Higashiguchi, M, Shimada, K, Namatame, H, Taniguchi, M, Kubota, M & Ono, K 2007, 'Independent control of charge and spin density in Sr_{1 - (x + y)} La_{x + y} Ti_{1 - x} Cr_x O₃ probed by photoemission spectroscopy', Journal of Magnetism and Magnetic Materials, vol. 310, no. 2 SUPPL. PART 2, pp. e278-e280. https://doi.org/10.1016/j.jmmm.2006.10.400

Kaneyoshi, S. ; Iwasawa, H. ; Saitoh, T. ; Aiura, Y. ; Satoh, D. ; Katsufuji, T. ; Hase, I. ; Higashiguchi, M. ; Shimada, K. ; Namatame, H. ; Taniguchi, M. ; Kubota, M. ; Ono, K. / Independent control of charge and spin density in Sr_{1 - (x + y)} La_{x + y} Ti_{1 - x} Cr_x O₃ probed by photoemission spectroscopy. In: Journal of Magnetism and Magnetic Materials. 2007 ; Vol. 310, No. 2 SUPPL. PART 2. pp. e278-e280.

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title = "Independent control of charge and spin density in Sr1 - (x + y) Lax + y Ti1 - x Crx O3 probed by photoemission spectroscopy",

abstract = "Using photoemission (PES) spectroscopy and a first-principles band-structure calculation, we have investigated the electronic structure of perovskite-type Ti-Cr oxides Sr1 - (x + y) Lax + y Ti1 - x Crx O3, in which the charge and spin density can be controlled. It was found that the near-Fermi level (EF) electronic structure consisted of a Cr 3d localized state and a Ti 3d itinerant state that were well separated in energy. The spectral weight of the Cr 3d state was proportional to x, demonstrating a controllable spin density. In contrast, the near-EF spectral weight exhibited different behavior. The band theory has reproduced the essential features of the Cr and Ti 3d states as well as the O 2p ones, but failed to predict the location of the Cr 3d and O 2p states. Implications of this discrepancy have been discussed in connection with calculated magnetic moments.",

keywords = "Electronic structure, Photoemission spectroscopy, SrTiO",

author = "S. Kaneyoshi and H. Iwasawa and T. Saitoh and Y. Aiura and D. Satoh and T. Katsufuji and I. Hase and M. Higashiguchi and K. Shimada and H. Namatame and M. Taniguchi and M. Kubota and K. Ono",

note = "Funding Information: This work was partly supported by a Grant-in-Aid for COE Research (13CE2002) by MEXT of Japan. The experiments have been done under the proposal Nos. 03-A-58, 04-A-39 (HSRC) and 06S2-001 (PF).",

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T1 - Independent control of charge and spin density in Sr1 - (x + y) Lax + y Ti1 - x Crx O3 probed by photoemission spectroscopy

AU - Kaneyoshi, S.

AU - Iwasawa, H.

AU - Saitoh, T.

AU - Aiura, Y.

AU - Satoh, D.

AU - Katsufuji, T.

AU - Hase, I.

AU - Higashiguchi, M.

AU - Shimada, K.

AU - Namatame, H.

AU - Taniguchi, M.

AU - Kubota, M.

AU - Ono, K.

N1 - Funding Information: This work was partly supported by a Grant-in-Aid for COE Research (13CE2002) by MEXT of Japan. The experiments have been done under the proposal Nos. 03-A-58, 04-A-39 (HSRC) and 06S2-001 (PF).

PY - 2007/3

Y1 - 2007/3

N2 - Using photoemission (PES) spectroscopy and a first-principles band-structure calculation, we have investigated the electronic structure of perovskite-type Ti-Cr oxides Sr1 - (x + y) Lax + y Ti1 - x Crx O3, in which the charge and spin density can be controlled. It was found that the near-Fermi level (EF) electronic structure consisted of a Cr 3d localized state and a Ti 3d itinerant state that were well separated in energy. The spectral weight of the Cr 3d state was proportional to x, demonstrating a controllable spin density. In contrast, the near-EF spectral weight exhibited different behavior. The band theory has reproduced the essential features of the Cr and Ti 3d states as well as the O 2p ones, but failed to predict the location of the Cr 3d and O 2p states. Implications of this discrepancy have been discussed in connection with calculated magnetic moments.

AB - Using photoemission (PES) spectroscopy and a first-principles band-structure calculation, we have investigated the electronic structure of perovskite-type Ti-Cr oxides Sr1 - (x + y) Lax + y Ti1 - x Crx O3, in which the charge and spin density can be controlled. It was found that the near-Fermi level (EF) electronic structure consisted of a Cr 3d localized state and a Ti 3d itinerant state that were well separated in energy. The spectral weight of the Cr 3d state was proportional to x, demonstrating a controllable spin density. In contrast, the near-EF spectral weight exhibited different behavior. The band theory has reproduced the essential features of the Cr and Ti 3d states as well as the O 2p ones, but failed to predict the location of the Cr 3d and O 2p states. Implications of this discrepancy have been discussed in connection with calculated magnetic moments.

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KW - SrTiO

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