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

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

doi:10.1016/j.elspec.2011.03.004

Spin-doping effect on the electronic structure of Sr _1-(x+y)La_x+yTi_1-xCr_xO₃

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

^*Corresponding author for this work

School of Advanced Science and Engineering

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

Abstract

We have investigated spin-doping effects on the valence-band electronic structure of Sr_1-(x+y)La_x+yTi_1-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 (E_F) weight due to the Ti 3d states showed significant reduction with x. Considering that the band theory predicted nearly constant density of states near E_F, this reduction of the near-E_F weight should be interpreted as a manifestation of strong Ti-Cr site disorder effects.

Original language	English
Pages (from-to)	232-235
Number of pages	4
Journal	Journal of Electron Spectroscopy and Related Phenomena
Volume	184
Issue number	3-6
DOIs	https://doi.org/10.1016/j.elspec.2011.03.004
Publication status	Published - 2011 Apr

Keywords

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

ASJC Scopus subject areas

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

Access to Document

10.1016/j.elspec.2011.03.004

Cite this

@article{73ce47d6ad4042d0ac4bd980ce32107b,

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

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.",

keywords = "Band structure calculations, Cr oxide, Electronic structure, Photoemission spectroscopy, Spin doping, Ti oxide",

author = "T. Saitoh and H. Iwasawa and K. Kurahashi and Y. Nakano and T. Katsufuji and I. Hase and K. Shimada and H. Namatame and M. Taniguchi",

year = "2011",

month = apr,

doi = "10.1016/j.elspec.2011.03.004",

language = "English",

volume = "184",

pages = "232--235",

journal = "Journal of Electron Spectroscopy and Related Phenomena",

issn = "0368-2048",

publisher = "Elsevier",

number = "3-6",

}

TY - JOUR

T1 - Spin-doping effect on the electronic structure of Sr 1-(x+y)Lax+yTi1-xCrxO3

AU - Saitoh, T.

AU - Iwasawa, H.

AU - Kurahashi, K.

AU - Nakano, Y.

AU - Katsufuji, T.

AU - Hase, I.

AU - Shimada, K.

AU - Namatame, H.

AU - Taniguchi, M.

PY - 2011/4

Y1 - 2011/4

N2 - 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.

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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