Spin-doping effect on the electronic structure of Sr 1-(x+y)Lax+yTi1-xCrxO3

T. Saitoh, H. Iwasawa, K. Kurahashi, Y. Nakano, Takuro Katsufuji, I. Hase, K. Shimada, H. Namatame, M. Taniguchi

    Research output: Contribution to journalArticle

    Abstract

    We have investigated spin-doping effects on the valence-band electronic structure of Sr1-(x+y)Lax+yTi1-xCr xO3 at y = 0.2 using high-resolution photoemission spectroscopy and first-principles band structure calculations. The Cr 3d photoemission spectral weight located between 2.0 and 3.5 eV increased with x, indicating that x works as a rough measure of the spin density. However, the increase in the spectral weight was actually more rapid than the band theory prediction. The near-Fermi level (EF) weight due to the Ti 3d states showed significant reduction with x. Considering that the band theory predicted nearly constant density of states near EF, this reduction of the near-EF weight should be interpreted as a manifestation of strong Ti-Cr site disorder effects.

    Original languageEnglish
    Pages (from-to)232-235
    Number of pages4
    JournalJournal of Electron Spectroscopy and Related Phenomena
    Volume184
    Issue number3-6
    DOIs
    Publication statusPublished - 2011 Apr

    Fingerprint

    Electronic structure
    Doping (additives)
    Signal filtering and prediction
    electronic structure
    Photoemission
    Photoelectron spectroscopy
    Valence bands
    Fermi level
    Band structure
    photoelectric emission
    disorders
    valence
    high resolution
    predictions
    spectroscopy

    Keywords

    • Band structure calculations
    • Cr oxide
    • Electronic structure
    • Photoemission spectroscopy
    • Spin doping
    • Ti oxide

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Physical and Theoretical Chemistry
    • Spectroscopy
    • Condensed Matter Physics
    • Atomic and Molecular Physics, and Optics
    • Radiation

    Cite this

    Spin-doping effect on the electronic structure of Sr 1-(x+y)Lax+yTi1-xCrxO3 . / Saitoh, T.; Iwasawa, H.; Kurahashi, K.; Nakano, Y.; Katsufuji, Takuro; Hase, I.; Shimada, K.; Namatame, H.; Taniguchi, M.

    In: Journal of Electron Spectroscopy and Related Phenomena, Vol. 184, No. 3-6, 04.2011, p. 232-235.

    Research output: Contribution to journalArticle

    Saitoh, T, Iwasawa, H, Kurahashi, K, Nakano, Y, Katsufuji, T, Hase, I, Shimada, K, Namatame, H & Taniguchi, M 2011, 'Spin-doping effect on the electronic structure of Sr 1-(x+y)Lax+yTi1-xCrxO3 ', Journal of Electron Spectroscopy and Related Phenomena, vol. 184, no. 3-6, pp. 232-235. https://doi.org/10.1016/j.elspec.2011.03.004
    Saitoh, T. ; Iwasawa, H. ; Kurahashi, K. ; Nakano, Y. ; Katsufuji, Takuro ; Hase, I. ; Shimada, K. ; Namatame, H. ; Taniguchi, M. / Spin-doping effect on the electronic structure of Sr 1-(x+y)Lax+yTi1-xCrxO3 In: Journal of Electron Spectroscopy and Related Phenomena. 2011 ; Vol. 184, No. 3-6. pp. 232-235.
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    abstract = "We have investigated spin-doping effects on the valence-band electronic structure of Sr1-(x+y)Lax+yTi1-xCr xO3 at y = 0.2 using high-resolution photoemission spectroscopy and first-principles band structure calculations. The Cr 3d photoemission spectral weight located between 2.0 and 3.5 eV increased with x, indicating that x works as a rough measure of the spin density. However, the increase in the spectral weight was actually more rapid than the band theory prediction. The near-Fermi level (EF) weight due to the Ti 3d states showed significant reduction with x. Considering that the band theory predicted nearly constant density of states near EF, this reduction of the near-EF weight should be interpreted as a manifestation of strong Ti-Cr site disorder effects.",
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    AU - Saitoh, T.

    AU - Iwasawa, H.

    AU - Kurahashi, K.

    AU - Nakano, Y.

    AU - Katsufuji, Takuro

    AU - Hase, I.

    AU - Shimada, K.

    AU - Namatame, H.

    AU - Taniguchi, M.

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    AB - We have investigated spin-doping effects on the valence-band electronic structure of Sr1-(x+y)Lax+yTi1-xCr xO3 at y = 0.2 using high-resolution photoemission spectroscopy and first-principles band structure calculations. The Cr 3d photoemission spectral weight located between 2.0 and 3.5 eV increased with x, indicating that x works as a rough measure of the spin density. However, the increase in the spectral weight was actually more rapid than the band theory prediction. The near-Fermi level (EF) weight due to the Ti 3d states showed significant reduction with x. Considering that the band theory predicted nearly constant density of states near EF, this reduction of the near-EF weight should be interpreted as a manifestation of strong Ti-Cr site disorder effects.

    KW - Band structure calculations

    KW - Cr oxide

    KW - Electronic structure

    KW - Photoemission spectroscopy

    KW - Spin doping

    KW - Ti oxide

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